Blog · October 11, 2026 · 10 min read
Spelling for University Students: Essays, Emails and Lost Marks

At school you might have written a few hundred words a week. At university the number can be ten times that: essays, lab reports, discussion posts, a dissertation looming at the end, and a steady stream of emails to people who have the power to grant an extension or write you a reference. For a student who was never really taught spelling, and there are a great many, this is the moment the gap starts to show. Spell-check catches most of it. Most is not all.
The words that slip through are predictable. They are the long, abstract, faintly Latin words of academic writing, "occurrence" and "existence" and "maintenance", together with a set of confusable pairs that spell-check waves through because both versions are real words. They also turn up in exactly the places where a reader is forming a judgment about you.
This guide is for any student writing at university or college level who wants to stop losing marks, and credibility, to spelling. It covers what markers actually notice, the words that go wrong and why, the traps spell-check cannot see, how to write a clean email to a professor, and a routine that fits into a real student's week.
Do spelling mistakes actually cost marks?
Directly, sometimes. Many marking rubrics include a line for presentation, mechanics or written expression, and spelling sits inside it. In most essays that line is worth a small share of the grade, and a few errors will not sink you. In some settings the stakes are higher: professional programs such as nursing, law and teaching often treat accurate writing as a professional competence, and a report full of errors can be marked down hard.
Indirectly, almost always. Spelling errors change how a reader sees everything else on the page. In a 2002 study, David Kreiner and colleagues gave people passages to read, some clean and some containing spelling errors, and found that readers rated the writers of the error-filled passages as less capable, even though the content was identical. Your marker is a person reading dozens of scripts, often late at night. Errors slow their reading, invite doubt, and quietly lower the trust they extend to your argument.
That is the real cost. Not the half-mark for "mechanics", but the sense, forming paragraph by paragraph, that the writer is careless. It is usually unfair, since spelling is a skill that many students were simply never taught. But it is how readers behave, and it is easier to fix the spelling than to change the readers.
The academic words that go wrong
A small set of words accounts for a surprising share of student spelling errors. They are long, they often contain an unstressed vowel you cannot hear, and many involve a doubled letter or a Latin ending. Here are some of the most common, with the reason each one goes wrong.
| Word | Common error | Why it goes wrong, and the fix |
|---|---|---|
| argument | arguement | "argue" drops its e before ment |
| definitely | definately | related to "finite", with an i |
| environment | enviroment | the n of "environ" is often lost in speech |
| occurrence | occurence | double c, double r, and ence |
| separate | seperate | the middle vowel is a; think "par" |
| receive | recieve | after c the order is ei |
| existence | existance | "exist" plus ence, the ending of "difference" |
| maintenance | maintainance | "maintain" loses its i and takes ence |
| government | goverment | "govern" plus ment; say the n |
Notice how many of these are fixed by a related word. "Definite" is built on "finite". "Environment" is built on "environ". "Government" is "govern" plus "ment". English tends to keep the spelling of a word's core even when the pronunciation blurs, so finding the smaller word inside a longer one is often the fastest way to the right letters.
Other words that regularly trouble students include "accommodate" (two c's and two m's), "necessary" (one c, two s's), "independent" (ent throughout), "criticism", "beginning", "occurred", "referred" and "privilege". Most of the academic vocabulary you will use repeatedly comes from a known set: the Academic Word List, compiled by Averil Coxhead in 2000, gathers 570 word families that together account for roughly one word in ten in academic texts. Our guide to spelling the Academic Word List works through the ones that cause trouble.
What spell-check cannot see
Spell-check compares each word you type with a dictionary. If the word exists, it passes. That means it cannot catch the most damaging class of error in academic writing: the real word used in the wrong place.
Some pairs matter more at university than anywhere else. "Principle" is a rule or belief; "principal" means main or first, or the head of a school. "Affect" is usually the verb and "effect" usually the noun. "Complement" completes something; "compliment" praises it. "Discrete" means separate; "discreet" means tactful. "Cite" is what you do to a source, "site" is a place, and "sight" is vision. "Led" is the past tense of "lead", which is also a metal. And the small ones, "its" and "it's", "whose" and "who's", "then" and "than", "lose" and "loose", catch almost everybody under deadline pressure. Our guide to affect, effect and forty other confused pairs settles the rest.
Then there are the plurals borrowed from Latin and Greek. One "criterion", several "criteria". One "phenomenon", several "phenomena". One "hypothesis", two "hypotheses"; one "analysis", many "analyses". "Data" is formally the plural of "datum", though treating it as a singular mass noun is now widely accepted; whichever you choose, be consistent. Writing "a criteria" or "this phenomena" is not a typing error, and no spell-checker will flag it, but an academic reader will notice at once.
Referencing brings its own small hazards. "Et al.", meaning "and others", takes a period after "al" only, because "et" is a complete Latin word and "al." is short for "alia". "Bibliography", "paraphrase", "citation" and "quotation" are all used constantly, and many markers still prefer "quotation" as the noun in formal writing, keeping "quote" for the verb.
The email to your professor
An email to a professor is short, which makes every error more visible. It is also often the first impression you make, and sometimes the only one before they decide whether to grant that extension.
Get the name right, first of all. Check it against the course page, including any accents or hyphens. Misspelling the name of the person you are writing to is the single most noticeable error you can make. Use "Dear Professor" followed by their surname unless they have told you otherwise.
Then watch the words that turn up in almost every student email. "Appreciate" has a double p. "Grateful" is spelled with "grate", not "great", even though it means you feel great. "Schedule", "available", "apologize", "extension", "definitely" and "sincerely" all appear constantly and all go wrong regularly. Watch for autocorrect as well: "definitely" is one of the words phone keyboards are known to turn into "defiantly", which changes your tone considerably.
A clean request can be very short:
"Dear Professor Okafor, I am in your Tuesday seminar for Environmental Policy. I would like to ask for a two-day extension on the essay due on Friday, because of a family illness. I would appreciate your consideration and can provide documentation if needed. With thanks, Dana Reyes."
Read it aloud before you send it. Reading aloud slows you down enough to catch the doubled words, missing words and wrong words that your eyes skim straight past.
Proofreading that actually catches errors
Most students proofread by reading their essay through once at the end, which catches fewer errors than you would hope. When you read your own writing, your brain knows what you meant to say and fills it in. You see the word you intended, not the word on the page.
A few techniques help break that illusion. Print the essay, or change the font and size on screen, so it looks unfamiliar. Read it aloud, slowly. Leave it overnight if you can; errors that were invisible at midnight tend to leap out at breakfast. And for spelling in particular, try reading the last paragraph first and working backward, which stops you following the argument and forces your attention onto individual words.
The most efficient trick of all is your own error list. If you know you write "seperate", "definately" or "occured", search your document for those exact misspellings before you submit. Most word processors will find every instance in seconds. A personal list of your usual errors turns proofreading from a vague reread into a precise check. There is more on building one in our guide to making a personal spelling list.
Is it too late to fix this at twenty?
No, and it is worth being clear about why, because many students quietly believe their spelling is fixed for life. Adults learn to spell by the same mechanisms as children: linking sounds to letters, understanding patterns and word families, and retrieving words from memory until they are automatic. What adults usually lack is not the ability but the teaching and the practice.
The research on memory is on your side. Harry Bahrick and his family spent nine years in a now famous study, published in 1993, learning foreign-language vocabulary on different schedules, and found that words practiced at widely spaced intervals were remembered years later. The same principle, spacing out your practice and testing yourself rather than rereading, applies to spelling at any age. Most students find that a few weeks of short daily practice fixes their worst words for good.
A routine for a busy student
You do not need a spelling course. You need ten minutes, most days, applied to the right words.
Start a list of your own errors this week: from marked essays, from words spell-check keeps correcting, and from words you hesitate over. Keep it to around thirty. Each day, spell a handful from memory, check them, and bring back the ones you missed the next day. Words you get right can wait longer before you see them again; words you get wrong come back tomorrow. When a word has been right on three separate days over a couple of weeks, retire it and add a new one.
If you would rather not manage the schedule yourself, Spelling.School does it for you: it says each word, checks what you type, shows exactly which letters went wrong, and schedules the word for review with spaced repetition. Its higher levels include the academic vocabulary that fills university essays.
Where to start
Before your next essay goes in, search it for your three most common misspellings and fix every instance. Then start the list. Ten minutes a day over one semester is enough to take most students from quietly anxious about their spelling to not thinking about it at all, which is where you want to be when you have forty pages of argument to worry about instead.
Questions people ask
Do spelling mistakes lower essay grades?
Often, though usually indirectly. Many rubrics include a small component for presentation or written expression, where spelling is counted directly. More importantly, research has found that readers judge writers with spelling errors as less capable even when the content is identical, so errors can color a marker's view of the whole essay. In professional programs such as nursing, law or teaching, accurate writing may be assessed more strictly.
What words do college students misspell most?
Common trouble spots include definitely, separate, argument, occurrence, receive, environment, existence, maintenance, government, accommodate and necessary. Many of these contain an unstressed vowel, a doubled letter or a Latin ending. Confusable pairs such as principle and principal, affect and effect, and its and it's cause many more errors, because spell-check accepts both words in each pair.
How do I improve my spelling for university?
Build a personal list of the words you actually get wrong, from marked work and from words spell-check keeps correcting. Practice about ten minutes most days by spelling words from memory, checking them, and bringing back the ones you miss after a short gap. Before submitting work, search your document for your most common misspellings and fix every instance.
Is it too late to fix spelling at 20?
No. Adults learn spelling through the same processes as children: linking sounds to letters, understanding patterns and word families, and practicing retrieval until words are automatic. Research on spaced practice shows adults can retain learned vocabulary for years. Most students who practice their own problem words for a few weeks see a clear improvement.
How do I write a professor without mistakes?
Check the professor's name against the course page and spell it exactly, then keep the email short and specific. Watch common email words such as appreciate, grateful, schedule, available and sincerely, and check that autocorrect has not changed definitely to defiantly. Read the email aloud before sending, which slows you down enough to catch missing, doubled or wrong words.
Does spell-check catch all spelling mistakes?
No. Spell-check only confirms that each word exists, so it misses real words used in the wrong place, such as principal for principle, compliment for complement, or its for it's. It also misses errors in Latin and Greek plurals, such as writing a criteria instead of a criterion. Careful proofreading and a personal list of your usual errors catch what spell-check cannot.
Questions people ask
Do spelling mistakes lower essay grades?
Often, though usually indirectly. Many rubrics include a small component for presentation or written expression, where spelling is counted directly. More importantly, research has found that readers judge writers with spelling errors as less capable even when the content is identical, so errors can color a marker's view of the whole essay. In professional programs such as nursing, law or teaching, accurate writing may be assessed more strictly.
What words do college students misspell most?
Common trouble spots include definitely, separate, argument, occurrence, receive, environment, existence, maintenance, government, accommodate and necessary. Many of these contain an unstressed vowel, a doubled letter or a Latin ending. Confusable pairs such as principle and principal, affect and effect, and its and it's cause many more errors, because spell-check accepts both words in each pair.
How do I improve my spelling for university?
Build a personal list of the words you actually get wrong, from marked work and from words spell-check keeps correcting. Practice about ten minutes most days by spelling words from memory, checking them, and bringing back the ones you miss after a short gap. Before submitting work, search your document for your most common misspellings and fix every instance.
Is it too late to fix spelling at 20?
No. Adults learn spelling through the same processes as children: linking sounds to letters, understanding patterns and word families, and practicing retrieval until words are automatic. Research on spaced practice shows adults can retain learned vocabulary for years. Most students who practice their own problem words for a few weeks see a clear improvement.
How do I write a professor without mistakes?
Check the professor's name against the course page and spell it exactly, then keep the email short and specific. Watch common email words such as appreciate, grateful, schedule, available and sincerely, and check that autocorrect has not changed definitely to defiantly. Read the email aloud before sending, which slows you down enough to catch missing, doubled or wrong words.
Does spell-check catch all spelling mistakes?
No. Spell-check only confirms that each word exists, so it misses real words used in the wrong place, such as principal for principle, compliment for complement, or its for it's. It also misses errors in Latin and Greek plurals, such as writing a criteria instead of a criterion. Careful proofreading and a personal list of your usual errors catch what spell-check cannot.
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