Which to use
“course” and “courses” are a confusable English pair: similar on the page, but distinct in meaning, check the gloss before you choose.
- #343
- “course” frequency rank
- #3,223
- “courses” frequency rank
- 3566
- confusion score
Side-by-Side Comparison
| Feature | course | courses |
|---|---|---|
| Definition | A sequence of events. | plural of course |
Where the eye mixes course and courses
Muted = shared; highlighted = the visual trap. They share 6 letters in sequence.
Why the eye confuses course with courses
A purely visual mix-up. course (/kɔːs/) and courses (/ˈkɔːsɪz/) are said differently, so reading them aloud is the quickest way to catch the wrong one. On the page they stay close: they differ by 1 extra letter(s) - “course” sits inside “courses”. Our composite confusion score for this pair is 3566, derived from the frequency rank of both members and their visual similarity.
course is recorded at frequency rank #343, classified as anoun, pronounced /kɔːs/. courses is at rank #3,223, tagged as anoun, pronounced /ˈkɔːsɪz/.
Glosses for this pair are partially populated in our dataset, but the full side-by-side definitions above should still guide you to the right choice.
With a confusion score of 3566, this pair ranks #521,732 of 530,003 scored English confusable pairs - a relatively easy-to-tell-apart pair.
Orthographic DNA of course vs courses
Shared letters: ceorsu. Private to "course": -. Private to "courses": -.
"course" · 6 letters · shape CVVCCV · "courses" · 7 letters · shape CVVCCVC
Known mistypes of this pair
Frequently Asked Questions
Can "course" and "courses" be used interchangeably?
In ordinary English text, does "course" or "courses" show up more?
Useful next steps
Pronunciation already separates them, if the page still looks alike, the dictionary links below settle it.
- Full dictionary entry for "course" with definition, IPA, and generated misspellings. Word entry
- Full dictionary entry for "courses" - compare definitions side by side with the headword page. Word entry
- This pair ranks #521,732 of 530,003 scored English confusable pairs in this corpus vintage. Corpus statistics
- "course" and "courses" also get mixed up with nearby pairs, the highest-scored neighbour is "cours vs courses". Nearby pair
- Recorded mistypes exist for at least one side of this pair, useful when a spell-checker or OCR lands on the wrong form. See mistypes
Confusion rank #521,732 of 530,003 scored English pairs, corpus vintage 2026-09-03, not spelling advice.