Which to use
“once” and “ouïe” are a confusable French pair: similar on the page, but distinct in meaning, check the gloss before you choose.
- #11,815
- “once” frequency rank
- #20,804
- “ouïe” frequency rank
- 32619
- confusion score
Side-by-Side Comparison
| Feature | once | ouïe |
|---|---|---|
| Definition | Unité de mesure de la masse (système impérial britannique avoirdupois), qui vaut 28,3495231 grammes pour l'once commune → voir ounce. Ses symboles sont oz et ℥. L'once troy (troy ounce) équivaut pour sa part à 31,1034768 grammes. | Sens par lequel on perçoit les sons, les autres sens sont la vue, l’odorat, le goût, le toucher ou encore la douleur. |
Where the eye mixes once and ouïe
Muted = shared; highlighted = the visual trap. They share 2 letters in sequence.
Why the eye confuses once with ouïe
A purely visual mix-up. once (\ɔ̃s\) and ouïe (\wi\) 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 32619, derived from the frequency rank of both members and their visual similarity.
once is recorded at frequency rank #11,815, classified as anoun, pronounced \ɔ̃s\. ouïe is at rank #20,804, tagged as anoun, pronounced \wi\.
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 32619, this pair ranks #296,099 of 440,172 scored French confusable pairs - roughly mid-pack for confusability.
Orthographic DNA of once vs ouïe
Shared letters: eo. Private to "once": cn. Private to "ouïe": uï.
"once" · 4 letters · shape VCCV · "ouïe" · 4 letters · shape VVCV
Known mistypes of this pair
- once ← ocne · oncce · onec · onnce
Frequently Asked Questions
Do "once" and "ouïe" mean the same thing in a sentence?
Which is more common, "once" or "ouïe"?
What to do next
Eye-level mix-up between "once" and "ouïe" is sorted above. Next: full entries or other pairs that share a letter shape.
- Full dictionary entry for "once" with definition, IPA, and generated misspellings. Word entry
- Full dictionary entry for "ouïe" - compare definitions side by side with the headword page. Word entry
- This pair ranks #296,099 of 440,172 scored French confusable pairs in this corpus vintage. Corpus statistics
- "once" and "ouïe" also get mixed up with nearby pairs, the highest-scored neighbour is "oim vs ouïe". 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 #296,099 of 440,172 scored French pairs, corpus vintage 2026-09-03, not spelling advice.