Which to use
“ace” is a noun and “af” is a preposition - they look or sound alike but fill different roles in a sentence.
- #14,189
- “ace” frequency rank
- #14,405
- “af” frequency rank
- 28594
- confusion score
Side-by-Side Comparison
| Feature | ace | af |
|---|---|---|
| Definition | Service gagnant sans que l'adversaire ait touché la balle. | De. Note d’usage : la préposition est suivie du datif. |
Where the eye mixes ace and af
Muted = shared; highlighted = the visual trap. They share 1 letter in sequence.
Why the eye confuses ace with af
These two trip readers on the page rather than in the ear: ace is \ɛs\ while af is \aːv\. 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 (noun vs preposition), which is usually the fastest check. Our composite confusion score for this pair is 28594, derived from the frequency rank of both members and their visual similarity.
ace is recorded at frequency rank #14,189, classified as anoun, pronounced \ɛs\. af is at rank #14,405, tagged as aprep, pronounced \aːv\.
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 28594, this pair ranks #321,842 of 440,172 scored French confusable pairs - roughly mid-pack for confusability.
Orthographic DNA of ace vs af
Shared letters: a. Private to "ace": ce. Private to "af": f.
"ace" · 3 letters · shape VCV · "af" · 2 letters · shape VC
Frequently Asked Questions
Is swapping "ace" for "af" ever safe?
Frequency check: "ace" vs "af" - which ranks higher?
Useful next steps
Pronunciation already separates them, if the page still looks alike, the dictionary links below settle it.
- Full dictionary entry for "ace" with definition, IPA, and generated misspellings. Word entry
- Full dictionary entry for "af" - compare definitions side by side with the headword page. Word entry
- This pair ranks #321,842 of 440,172 scored French confusable pairs in this corpus vintage. Corpus statistics
- "ace" and "af" also get mixed up with nearby pairs, the highest-scored neighbour is "af vs aur". Nearby pair
Confusion rank #321,842 of 440,172 scored French pairs, corpus vintage 2026-09-03, not spelling advice.