Which to use
“once” and “onde” are a confusable French pair: similar on the page, but distinct in meaning, check the gloss before you choose.
- #11,815
- “once” frequency rank
- #6,324
- “onde” frequency rank
- 18139
- confusion score
Side-by-Side Comparison
| Feature | once | onde |
|---|---|---|
| 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. | Ondulations d’un milieu élastique ou d’un flux électromagnétique. Perturbation d’un milieu qui se propage. |
Where the eye mixes once and onde
Muted = shared; highlighted = the visual trap. They share 3 letters in sequence.
Look-alike desk: once vs onde
A purely visual mix-up. once (\ɔ̃s\) and onde (\ɔ̃d\) 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 a single letter - c in “once” becomes d in “onde”. Our composite confusion score for this pair is 18139, 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\. onde is at rank #6,324, tagged as anoun, pronounced \ɔ̃d\.
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 18139, this pair ranks #379,800 of 440,172 scored French confusable pairs - a relatively easy-to-tell-apart pair.
Orthographic DNA of once vs onde
Shared letters: eno. Private to "once": c. Private to "onde": d.
"once" · 4 letters · shape VCCV · "onde" · 4 letters · shape VCCV
Known mistypes of this pair
Frequently Asked Questions
Do "once" and "onde" mean the same thing in a sentence?
Which is more common, "once" or "onde"?
What to do next
Eye-level mix-up between "once" and "onde" 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 "onde" - compare definitions side by side with the headword page. Word entry
- This pair ranks #379,800 of 440,172 scored French confusable pairs in this corpus vintage. Corpus statistics
- "once" and "onde" also get mixed up with nearby pairs, the highest-scored neighbour is "och vs once". 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 #379,800 of 440,172 scored French pairs, corpus vintage 2026-09-03, not spelling advice.