Which to use
“once” and “ong” are a confusable French pair: similar on the page, but distinct in meaning, check the gloss before you choose.
- #11,815
- “once” frequency rank
- #6,860
- “ong” frequency rank
- 18675
- confusion score
Side-by-Side Comparison
| Feature | once | ong |
|---|---|---|
| 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. | Abeille (classificateur con). |
Where the eye mixes once and ong
Muted = shared; highlighted = the visual trap. They share 2 letters in sequence.
Why the eye confuses once with ong
A purely visual mix-up. once (\ɔ̃s\) and ong (\ɔŋ˦\) 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 18675, 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\. ong is at rank #6,860, tagged as anoun, pronounced \ɔŋ˦\.
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 18675, this pair ranks #377,104 of 440,172 scored French confusable pairs - a relatively easy-to-tell-apart pair.
Orthographic DNA of once vs ong
Shared letters: no. Private to "once": ce. Private to "ong": g.
"once" · 4 letters · shape VCCV · "ong" · 3 letters · shape VCC
Known mistypes of this pair
- once ← ocne · oncce · onec · onnce
Frequently Asked Questions
Can "once" and "ong" be used interchangeably?
Which is more common, "once" or "ong"?
Useful next steps
Pronunciation already separates them, if the page still looks alike, the dictionary links below settle it.
- Full dictionary entry for "once" with definition, IPA, and generated misspellings. Word entry
- Full dictionary entry for "ong" - compare definitions side by side with the headword page. Word entry
- This pair ranks #377,104 of 440,172 scored French confusable pairs in this corpus vintage. Corpus statistics
- "once" and "ong" 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 #377,104 of 440,172 scored French pairs, corpus vintage 2026-09-03, not spelling advice.