Aa vs As, What's the Difference?

Which to use

“Aa” and “As” are a confusable French pair: similar on the page, but distinct in meaning, check the gloss before you choose.

#12,704
“Aa” frequency rank: #135
“As” frequency rank: 12839
confusion score

Side-by-Side Comparison

Feature	Aa	As
Definition	Abréviation standard du mycologue néerlandais Hubertus Antonius van der Aa.	Commune de la province de Limbourg de la région flamande de Belgique.

Letter map: Aa vs As

Shared letters muted; letters that set Aa and As apart highlighted. Shared run: 1.

2 ch

Corpus notes: Aa and As

Aa and As are indexed as a confusable French 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 a single letter - a in “Aa” becomes s in “As”. Our composite confusion score for this pair is 12839, derived from the frequency rank of both members and their visual similarity.

Aa is recorded at frequency rank #12,704, classified as aname. As is at rank #135, tagged as aname, pronounced \as\.

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 12839, this pair ranks #403,548 of 440,172 scored French confusable pairs - a relatively easy-to-tell-apart pair.

Orthographic DNA of Aa vs As

Shared letters: a. Private to "Aa": -. Private to "As": s.

"Aa" · 2 letters · shape VV · "As" · 2 letters · shape VC

Frequently Asked Questions

Do "Aa" and "As" mean the same thing in a sentence?

No. They differ by a single letter - a in “Aa” becomes s in “As”, but the dictionary glosses above give them different meanings, so swapping one for the other changes what the sentence says.

Which is more common, "Aa" or "As"?

"As" is the more common of the two: it sits at frequency rank #135 in our French list, against #12,704 for "Aa". That is a wide gap, so in ordinary text the rarer spelling is the one worth double-checking.

What to do next

You've compared "Aa" and "As". Here's where to go from here.

Full dictionary entry for "Aa" with definition, IPA, and generated misspellings. Word entry
Full dictionary entry for "As" - compare definitions side by side with the headword page. Word entry
This pair ranks #403,548 of 440,172 scored French confusable pairs in this corpus vintage. Corpus statistics
"Aa" and "As" also get mixed up with nearby pairs, the highest-scored neighbour is "Aa vs aur". Nearby pair

Confusion rank #403,548 of 440,172 scored French pairs, corpus vintage 2026-09-03, not spelling advice.