Which to use
“coli” and “cos” are a confusable English pair: similar on the page, but distinct in meaning, check the gloss before you choose.
- #20,590
- “coli” frequency rank
- #6,553
- “cos” frequency rank
- 27143
- confusion score
Side-by-Side Comparison
| Feature | coli | cos |
|---|---|---|
| Definition | Escherichia coli, a Gram-negative bacterium commonly found in the lower intestine of warm-blooded organisms. | Synonym of romaine lettuce, a long-leaved variety of lettuce. |
Where the eye mixes coli and cos
Muted = shared; highlighted = the visual trap. They share 2 letters in sequence. coli runs 4 letters (CVCV) against cos's 3 (CVC) - the length gap alone is often enough to separate them once you know to check it.
Look-alike desk: coli vs cos
A purely visual mix-up. coli (/ˈkoʊ.laɪ/) and cos (/kɑs/) 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 letter(s) in length. Our composite confusion score for this pair is 27143, derived from the frequency rank of both members and their visual similarity.
coli is recorded at frequency rank #20,590, classified as anoun, pronounced /ˈkoʊ.laɪ/. cos is at rank #6,553, tagged as anoun, pronounced /kɑs/.
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 27143, this pair ranks #381,249 of 530,003 scored English confusable pairs - roughly mid-pack for confusability.
Orthographic DNA of coli vs cos
Shared letters: co. Private to "coli": il. Private to "cos": s.
"coli" · 4 letters · shape CVCV · "cos" · 3 letters · shape CVC
Known mistypes of this pair
- coli ← ccoli · cloi · colli · ocli
Frequently Asked Questions
Do "coli" and "cos" mean the same thing in a sentence?
Which is more common, "coli" or "cos"?
After this comparison
Pronunciation already separates them, if the page still looks alike, the dictionary links below settle it.
- Full dictionary entry for "coli" with definition, IPA, and generated misspellings. Word entry
- Full dictionary entry for "cos" - compare definitions side by side with the headword page. Word entry
- This pair ranks #381,249 of 530,003 scored English confusable pairs in this corpus vintage. Corpus statistics
- "coli" and "cos" also get mixed up with nearby pairs, the highest-scored neighbour is "coli vs coms". 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 #381,249 of 530,003 scored English pairs, corpus vintage 2026-09-03, not spelling advice.