15 Spelling Mistakes That Make You Look Unprofessional at Work

You can be excellent at your job and still lose a little credibility every time "definately" goes out in an email. It is not fair. Readers do not see the thought behind a message, only the words on the screen, and a misspelling is one of the few things a busy reader notices without trying.

The frustrating part is that the words professionals get wrong are rarely obscure. They are the everyday words of work: separate, receive, recommend, colleague. They appear in dozens of emails a week, which is exactly why a wrong version becomes a habit.

This guide covers the 15 misspellings that turn up most in workplace writing, why each one happens, and a memory hook for each. It ends with a short routine that makes the correct spellings automatic, so you stop having to think about them at all.

Why a small error costs more than it should

Researchers have measured this, and the results are sobering. In a 2016 study, Julie Boland and Robin Queen asked people to read short email replies to an advertisement for a housemate. Some emails contained typos or grammar errors. Readers judged the writers of error-filled emails less favorably across the board, on qualities such as intelligence, trustworthiness and suitability as a housemate, and typos did roughly twice as much damage as grammar mistakes. The emails said exactly the same thing. Only the spelling changed.

The stakes rise in hiring. Christelle Martin-Lacroux and Alain Lacroux asked 536 French recruiters to assess application forms, some of which contained spelling errors. They found that spelling errors reduced an applicant's chance of being shortlisted about as much as a lack of professional experience did.

None of this means readers are right to judge you this way. A misspelling usually says nothing about your intelligence and everything about how you were taught. Plenty of capable people were never shown why English spells words the way it does. But it helps to know the cost, because it tells you where ten minutes of practice pays back.

Spell-check will not fully protect you. It catches many typos, but it misses real words used wrongly, such as their for there or affect for effect, and it cannot help in the places you type without it: chat tools, forms, whiteboards and slides. There is also reasonable evidence that leaning on it means you never learn the words yourself. Why spell-check and autocorrect are making your spelling worse looks at that in detail.

The quick list

If you only read one section, make it this one. These are the 15, with the version people usually write.

The schwa words: definitely, separate, maintenance

Three of the fifteen share one cause. In each, a vowel in an unstressed syllable weakens to a soft "uh" sound, called the schwa. You cannot hear which letter it is, so you guess, and the guess is often wrong. English has a lot of these, and the schwa is behind a large share of adult spelling mistakes.

Definitely. The middle sounds like "def-uh-nut-ly", so people write definately. The fix is to find the word inside it: de-finite-ly. Something definite has a fixed, finite edge. Once you see "finite", the i is obvious.

Separate. The second syllable is a schwa, so seperate feels as plausible as the real thing. The old hook works well: there is a rat in separate. It carries into separately and separation too.

Maintenance. The verb is maintain, with "ai", so people carry the "ai" into the noun and write maintainance. But the noun changes shape: main-ten-ance. Say it in three beats, with "ten" in the middle, and the spelling follows the sound.

The double-letter words: accommodate, occurrence, recommend, necessary

Four more are all about double letters. English doubles consonants in many Latin-derived words, often because a prefix was merged into the root long ago, and the pattern is not something you can hear.

Accommodate. This is one of the most misspelled words in English. It has two c's and two m's. A good hook is that the word is large enough to accommodate both pairs. Accommodation follows the same pattern, which matters in any role that books travel or rooms.

Occurrence. Two traps at once: the double r and the ending. When occur adds an ending that starts with a vowel, the r doubles, because the stress falls on the last syllable: occurred, occurring, occurrence. And the noun ends in -ence, not -ance, like reference and difference.

Recommend. People double the wrong letter and write reccomend. It is re + commend, and "commend" already has the two m's and only one c. If you know commend, you know recommend.

Necessary. One c, two s's. The classic hook is a shirt: it has one collar and two sleeves. Necessarily and necessity keep the same pattern.

The vowel-order words: receive, privilege, liaison, hierarchy

These go wrong because the vowels come in an unexpected order, or a letter sneaks in that is not there.

Receive. The "i before e except after c" rule is unreliable for many words, but it works for this family. After c, it is e then i: receive, receipt, deceive, conceive.

Privilege. Many people add a d and write priviledge, because of words like "knowledge" and "ledge". There is no d. The word comes from the Latin for a private law, and the "leg" is the same root as in legal. Privi + lege, no ledge.

Liaison. The word is French and keeps three vowels in a row: l-i-a-i-son. The common error drops the second i. Say the vowels as "i, a, i", or remember that a liaison has an i on each side of the a, one for each party it connects.

Hierarchy. People swap the first vowels and write heirarchy, perhaps because of "heir". The first part is hier-, from the Greek word for sacred, the same beginning as hieroglyph. If you can spell hieroglyph, you can spell hierarchy.

The long, borrowed words: entrepreneur, conscientious, questionnaire, colleague

The last four are long, borrowed, and full of letters that do not match the sound.

Entrepreneur. A French word with a lot of r's and e's. Break it into three chunks and say each: entre, pre, neur. The chunk people lose is the middle "pre". The ending is -eur, as in amateur and chauffeur, not -uer.

Conscientious. Start from conscience, which most people can spell, then replace the final "ce" with -tious: conscien + tious. The spelling keeps the "sci" of science and conscience, even though you hear "shee".

Questionnaire. This one has one more n than you expect. It is question + n + aire, with the French ending -aire, as in millionaire. If you type questionaire, you are missing the extra n.

Colleague. People write collegue, dropping the a. The word ends exactly like league. Your colleague is in your league.

How to make these permanent

Reading this list will not fix your spelling. You will nod at each hook and still type "seperate" next Tuesday, because recognizing a spelling and producing it are different skills. What changes a habit is practice that makes you produce the word from memory.

The research on this is solid. The testing effect means that pulling a word out of memory strengthens it far more than looking at it again; Roediger and Karpicke's 2006 experiments are a well-known demonstration. The spacing effect means that short sessions spread across days beat one long session. Put together, the method is simple.

1. Pick the three words on the list that you get wrong most. Do not start with fifteen.
2. Have the word read to you, or read it yourself and cover it, then type it from memory.
3. Check it letter by letter and look at the exact letters you missed.
4. Test yourself again tomorrow, then after three days, then after a week.
5. When a word survives a week without a miss, add a new one.

This takes a few minutes a day. Spelling.School runs the same loop for you: you hear a word, type it, see which letters went wrong, and it comes back for review with spaced repetition. There are career word lists as well as general levels. A notebook and a colleague reading aloud work too.

If you would rather do this quietly, how to spell better at work without anyone knowing has practical ways to fit it into a working day.

What to do when you are unsure in the moment

Practice fixes the long term. In the meantime, a few habits protect you.

Before an important message goes out, search it for your own known problem words. If you know you write "recieve", search for "ie" and check each hit. It takes seconds.

Keep a short list of your personal trouble words where you can see it. Five words on a sticky note beat a web search each time.

If you are unsure and in a hurry, use a different word. "Certainly" for "definitely" is not weakness; it is good judgment. Just do not let it become permanent, or your vocabulary quietly shrinks around the words you fear.

And if a typo does slip through, do not panic. A one-off error in a routine message is forgotten quickly. What readers notice is a pattern, and a pattern is exactly what practice removes.

The single most useful thing to do next

Look back at the quick list and choose the three words you personally get wrong. If you are not sure which they are, a twenty-minute self-audit of your own sent emails will tell you.

Then practice those three from memory for five minutes today, again tomorrow, and again in three days. If you want the scheduling done for you, Spelling.School starts with a short warm-up that finds your level, and its free plan keeps every review and adds three new words a day. In a month, the words that used to catch you will simply come out right, and you will stop thinking about them at all.

Questions people ask

What are the most commonly misspelled words at work?

Some of the most frequent are definitely, separate, accommodate, occurrence, receive, recommend, necessary, colleague, maintenance and privilege. They are ordinary words that appear in emails and reports every day, which is why a wrong version becomes a habit. Most of the errors come from unstressed vowels you cannot hear, double letters, and vowels in an unexpected order.

Do spelling mistakes really affect how people see you at work?

Research suggests they do. In one study, readers judged the writers of emails containing typos less favorably, on qualities such as intelligence and trustworthiness, than the writers of otherwise identical emails. In a French study of 536 recruiters, spelling errors in application forms reduced the chance of being shortlisted about as much as a lack of experience did.

Why does spell-check not catch all my spelling mistakes?

A spell-checker only checks whether each word exists, not whether it is the word you meant. It misses real words used wrongly, such as their for there or affect for effect. It also cannot help in places without it, such as some chat tools, forms, slides and handwritten notes.

How do I stop misspelling the same word over and over?

Practice producing the word from memory rather than looking at the right spelling. Type it without looking, check each letter, and test yourself again the next day, then after three days, then after a week. Spaced recall like this replaces the old habit far better than rereading a list.

Is it definitely or definately?

The correct spelling is definitely. The word contains finite: de-finite-ly. The middle vowel is unstressed and sounds like "uh", which is why many people guess an a, but the related word definite shows that it is an i.

How do you spell accommodate?

Accommodate is spelled with two c's and two m's: a-c-c-o-m-m-o-d-a-t-e. The same doubling appears in accommodation. A common memory hook is that the word is large enough to accommodate both double letters.

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