asa vs at, What's the Difference?

Which to use

“asa” is a noun and “at” is a preposition - they look or sound alike but fill different roles in a sentence.

#7,104
“asa” frequency rank: #1,457
“at” frequency rank: 8561
confusion score

Side-by-Side Comparison

Feature	asa	at
Definition	membro de um animal que serve para o voo	em, a

Where the eye mixes asa and at

Muted = shared; highlighted = the visual trap. They share 1 letter in sequence.

3 ch

asa

2 ch

Look-alike desk: asa vs at

These two trip readers on the page rather than in the ear: asa is /ˈa.zɐ/ while at is \æt\. 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 8561, derived from the frequency rank of both members and their visual similarity.

asa is recorded at frequency rank #7,104, classified as anoun, pronounced /ˈa.zɐ/. at is at rank #1,457, tagged as aprep, pronounced \æt\.

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 8561, this pair ranks #65,170 of 75,631 scored Portuguese confusable pairs - a relatively easy-to-tell-apart pair.

Orthographic DNA of asa vs at

Shared letters: a. Private to "asa": s. Private to "at": t.

"asa" · 3 letters · shape VCV · "at" · 2 letters · shape VC

Frequently Asked Questions

Do "asa" and "at" mean the same thing in a sentence?

No - they are not even the same part of speech. "asa" is a noun and "at" a preposition, so a sentence built for one is usually ungrammatical with the other.

Which is more common, "asa" or "at"?

"at" is the more common of the two: it sits at frequency rank #1,457 in our Portuguese list, against #7,104 for "asa". The two are close in frequency, so neither is a safe default; check the meaning rather than guessing.

What to do next

Pronunciation already separates them, if the page still looks alike, the dictionary links below settle it.

Full dictionary entry for "asa" with definition, IPA, and generated misspellings. Word entry
Full dictionary entry for "at" - compare definitions side by side with the headword page. Word entry
This pair ranks #65,170 of 75,631 scored Portuguese confusable pairs in this corpus vintage. Corpus statistics
"asa" and "at" also get mixed up with nearby pairs, the highest-scored neighbour is "acs vs asa". Nearby pair

Confusion rank #65,170 of 75,631 scored Portuguese pairs, corpus vintage 2026-09-03, not spelling advice.