Which to use
“obs” and “osa” are a confusable French pair: similar on the page, but distinct in meaning, check the gloss before you choose.
- #13,851
- “obs” frequency rank
- #43,047
- “osa” frequency rank
- 56898
- confusion score
Side-by-Side Comparison
| Feature | obs | osa |
|---|---|---|
| Definition | Deuxième personne du singulier de l’impératif présent de obsen. | Troisième personne du singulier du passé simple de oser. |
Where the eye mixes obs and osa
Muted = shared; highlighted = the visual trap. They share 2 letters in sequence.
Why the eye confuses obs with osa
A purely visual mix-up. obs (\ɔps\) and osa (\o.za\) are said differently, so reading them aloud is the quickest way to catch the wrong one. On the page they stay close: they share most of their letters but differ in 2 positions. Our composite confusion score for this pair is 56898, derived from the frequency rank of both members and their visual similarity.
obs is recorded at frequency rank #13,851, classified as averb, pronounced \ɔps\. osa is at rank #43,047, tagged as averb, pronounced \o.za\.
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 56898, this pair ranks #118,263 of 440,172 scored French confusable pairs - roughly mid-pack for confusability.
Orthographic DNA of obs vs osa
Shared letters: os. Private to "obs": b. Private to "osa": a.
"obs" · 3 letters · shape VCC · "osa" · 3 letters · shape VCV
Frequently Asked Questions
Is swapping "obs" for "osa" ever safe?
In ordinary French text, does "obs" or "osa" 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 "obs" with definition, IPA, and generated misspellings. Word entry
- Full dictionary entry for "osa" - compare definitions side by side with the headword page. Word entry
- This pair ranks #118,263 of 440,172 scored French confusable pairs in this corpus vintage. Corpus statistics
- "obs" and "osa" also get mixed up with nearby pairs, the highest-scored neighbour is "och vs osa". Nearby pair
Confusion rank #118,263 of 440,172 scored French pairs, corpus vintage 2026-09-03, not spelling advice.