Which to use
“o's” and “onus” are a confusable English pair: similar on the page, but distinct in meaning, check the gloss before you choose.
- #30,902
- “o's” frequency rank
- #29,402
- “onus” frequency rank
- 60304
- confusion score
Side-by-Side Comparison
| Feature | o's | onus |
|---|---|---|
| Definition | plural of the letter o | A legal obligation. |
Where the eye mixes o's and onus
Muted = shared; highlighted = the visual trap. They share 2 letters in sequence. o's runs 2 letters (VC) against onus's 4 (VCVC) - the length gap alone is often enough to separate them once you know to check it.
Why the eye confuses o's with onus
A purely visual mix-up. o's (/əʊz/) and onus (/ˈəʊnəs/) 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 60304, derived from the frequency rank of both members and their visual similarity.
o's is recorded at frequency rank #30,902, classified as anoun, pronounced /əʊz/. onus is at rank #29,402, tagged as anoun, pronounced /ˈəʊnəs/.
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 60304, this pair ranks #100,934 of 530,003 scored English confusable pairs - among the most confusable pairs.
Orthographic DNA of o's vs onus
Shared letters: os. Private to "o's": -. Private to "onus": nu.
"o's" · 2 letters · shape VC · "onus" · 4 letters · shape VCVC
Known mistypes of this pair
- onus ← onnus · onsu · onuss · ouns
Frequently Asked Questions
Do "o's" and "onus" mean the same thing in a sentence?
Frequency check: "o's" vs "onus" - which ranks higher?
After this comparison
Pronunciation already separates them, if the page still looks alike, the dictionary links below settle it.
- Full dictionary entry for "o's" with definition, IPA, and generated misspellings. Word entry
- Full dictionary entry for "onus" - compare definitions side by side with the headword page. Word entry
- This pair ranks #100,934 of 530,003 scored English confusable pairs in this corpus vintage. Corpus statistics
- "o's" and "onus" also get mixed up with nearby pairs, the highest-scored neighbour is "o's vs omi". 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 #100,934 of 530,003 scored English pairs, corpus vintage 2026-09-03, not spelling advice.