opavsouiTell them apart

Quick tell: opa is a noun, oui is an intj, so they fill different roles in a sentence.

Which to use

“opa” is a noun and “oui” is an intj - they look or sound alike but fill different roles in a sentence.

#39,466
“opa” frequency rank
#44,386
“oui” frequency rank
83852
confusion score

Side-by-Side Comparison

Feature opa oui
Definition Grandfather, grandpa. Synonym of yes.

Letter map: opa vs oui

Shared letters muted; letters that set opa and oui apart highlighted. Shared run: 1. opa (VCV) and oui (VVV) run the same length but a different consonant-vowel pattern - the shape difference is usually the fastest tell.

3 ch
opa
3 ch
oui

Grammar separator: opa vs oui

Our dataset has no pronunciation recorded for both members, so the reliable separator here is grammatical: opa is anoun and ouianintj. On the page they share most of their letters but differ in 2 positions. Our composite confusion score for this pair is 83852, derived from the frequency rank of both members and their visual similarity.

opa is recorded at frequency rank #39,466, classified as anoun. oui is at rank #44,386, tagged as anintj, pronounced /wiː/.

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 83852, this pair ranks #13,056 of 530,003 scored English confusable pairs - among the most confusable pairs.

Orthographic DNA of opa vs oui

Shared letters: o. Private to "opa": ap. Private to "oui": iu.

"opa" · 3 letters · shape VCV  ·  "oui" · 3 letters · shape VVV

Frequently Asked Questions

Is swapping "opa" for "oui" ever safe?
No - they are not even the same part of speech. "opa" is a noun and "oui" an intj, so a sentence built for one is usually ungrammatical with the other.
Frequency check: "opa" vs "oui" - which ranks higher?
"opa" is the more common of the two: it sits at frequency rank #39,466 in our English list, against #44,386 for "oui". The two are close in frequency, so neither is a safe default; check the meaning rather than guessing.

After this comparison

Pair "opa" vs "oui" is on the table, pick a follow-up below.

  • Full dictionary entry for "opa" with definition, IPA, and generated misspellings. Word entry
  • Full dictionary entry for "oui" - compare definitions side by side with the headword page. Word entry
  • This pair ranks #13,056 of 530,003 scored English confusable pairs in this corpus vintage. Corpus statistics
  • "opa" and "oui" also get mixed up with nearby pairs, the highest-scored neighbour is "omi vs oui". Nearby pair

Confusion rank #13,056 of 530,003 scored English pairs, corpus vintage 2026-09-03, not spelling advice.

Source: Wiktionary (via kaikki.org) Structured Wiktionary extract

Source: FrequencyWords open word-frequency list