ace vs ao, What's the Difference?

Which to use

“ace” and “ao” are a confusable English pair: similar on the page, but distinct in meaning, check the gloss before you choose.

#5,930
“ace” frequency rank: #17,538
“ao” frequency rank: 23468
confusion score

Side-by-Side Comparison

Feature	ace	ao
Definition	A playing card showing a single pip, typically the highest or lowest ranking card in a game.	grue ("blue or green", considered one color)

Letter map: ace vs ao

Shared letters muted; letters that set ace and ao apart highlighted. Shared run: 1.

3 ch

ace

2 ch

Corpus notes: ace and ao

ace and ao are indexed as a confusable English pair. We have no recorded pronunciation or part of speech for both members, so the spelling overlap is what we can show you: they differ by 1 letter(s) in length. Our composite confusion score for this pair is 23468, derived from the frequency rank of both members and their visual similarity.

ace is recorded at frequency rank #5,930, classified as anoun, pronounced /eɪs/. ao is at rank #17,538, tagged as anoun.

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 23468, this pair ranks #409,046 of 530,003 scored English confusable pairs - a relatively easy-to-tell-apart pair.

Orthographic DNA of ace vs ao

Shared letters: a. Private to "ace": ce. Private to "ao": o.

"ace" · 3 letters · shape VCV · "ao" · 2 letters · shape VV

Frequently Asked Questions

Can "ace" and "ao" be used interchangeably?

No. They differ by 1 letter(s) in length, but the dictionary glosses above give them different meanings, so swapping one for the other changes what the sentence says.

Which is more common, "ace" or "ao"?

"ace" is the more common of the two: it sits at frequency rank #5,930 in our English list, against #17,538 for "ao". The two are close in frequency, so neither is a safe default; check the meaning rather than guessing.

After this comparison

Done with this confusable. These links stay specific to "ace" and "ao".

Full dictionary entry for "ace" with definition, IPA, and generated misspellings. Word entry
Full dictionary entry for "ao" - compare definitions side by side with the headword page. Word entry
This pair ranks #409,046 of 530,003 scored English confusable pairs in this corpus vintage. Corpus statistics
"ace" and "ao" also get mixed up with nearby pairs, the highest-scored neighbour is "amb vs ao". Nearby pair

Confusion rank #409,046 of 530,003 scored English pairs, corpus vintage 2026-09-03, not spelling advice.