Which to use
“open” is an adjective and “opter” is a verb - they look or sound alike but fill different roles in a sentence.
- #3,628
- “open” frequency rank
- #15,952
- “opter” frequency rank
- 19580
- confusion score
Side-by-Side Comparison
| Feature | open | opter |
|---|---|---|
| Definition | Ouvert (d’esprit). | Choisir entre deux ou plusieurs choses qu’on ne peut avoir ensemble, entre deux ou plusieurs partis pour l’un desquels il faut se déterminer. |
Where the eye mixes open and opter
Muted = shared; highlighted = the visual trap. They share 3 letters in sequence.
Look-alike desk: open vs opter
These two trip readers on the page rather than in the ear: open is \ɔ.pœn\ while opter is \ɔp.te\. Spoken aloud the problem disappears. In writing it persists, because they differ by 1 letter(s) in length, and the parts of speech differ too (adjective vs verb), which is usually the fastest check. Our composite confusion score for this pair is 19580, derived from the frequency rank of both members and their visual similarity.
open is recorded at frequency rank #3,628, classified as anadj, pronounced \ɔ.pœn\. opter is at rank #15,952, tagged as averb, pronounced \ɔp.te\.
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 19580, this pair ranks #372,562 of 440,172 scored French confusable pairs - a relatively easy-to-tell-apart pair.
Orthographic DNA of open vs opter
Shared letters: eop. Private to "open": n. Private to "opter": rt.
"open" · 4 letters · shape VCVC · "opter" · 5 letters · shape VCCVC
Known mistypes of this pair
Frequently Asked Questions
Do "open" and "opter" mean the same thing in a sentence?
In ordinary French text, does "open" or "opter" 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 "open" with definition, IPA, and generated misspellings. Word entry
- Full dictionary entry for "opter" - compare definitions side by side with the headword page. Word entry
- This pair ranks #372,562 of 440,172 scored French confusable pairs in this corpus vintage. Corpus statistics
- "open" and "opter" also get mixed up with nearby pairs, the highest-scored neighbour is "opt vs opter". 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 #372,562 of 440,172 scored French pairs, corpus vintage 2026-09-03, not spelling advice.