arse vs ASA, What's the Difference?

Which to use

“arse” is a noun and “ASA” is a name - they look or sound alike but fill different roles in a sentence.

#13,462
“arse” frequency rank: #16,175
“ASA” frequency rank: 29637
confusion score

Side-by-Side Comparison

Feature	arse	ASA
Definition	A person's buttocks; the bottom, the backside. Also: the anus; the rectum.	Initialism of Acoustical Society of America.

Letter map: arse vs ASA

Shared letters muted; letters that set arse and ASA apart highlighted. Shared run: 2.

4 ch

arse

3 ch

ASA

Role in the sentence - arse and ASA

Our dataset has no pronunciation recorded for both members, so the reliable separator here is grammatical: arse is anoun and ASAaname. On the page they differ by 1 letter(s) in length. Our composite confusion score for this pair is 29637, derived from the frequency rank of both members and their visual similarity.

arse is recorded at frequency rank #13,462, classified as anoun, pronounced /ɑːs/. ASA is at rank #16,175, tagged as aname.

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 29637, this pair ranks #361,320 of 530,003 scored English confusable pairs - roughly mid-pack for confusability.

Orthographic DNA of arse vs ASA

Shared letters: as. Private to "arse": er. Private to "ASA": -.

"arse" · 4 letters · shape VCCV · "ASA" · 3 letters · shape VCV

Known mistypes of this pair

arse ← arrse · arsse · asre · rase

Frequently Asked Questions

Can "arse" and "ASA" be used interchangeably?

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

Which is more common, "arse" or "ASA"?

"arse" is the more common of the two: it sits at frequency rank #13,462 in our English list, against #16,175 for "ASA". The two are close in frequency, so neither is a safe default; check the meaning rather than guessing.

What to do next

Pair "arse" vs "ASA" is on the table, pick a follow-up below.

Full dictionary entry for "arse" with definition, IPA, and generated misspellings. Word entry
Full dictionary entry for "ASA" - compare definitions side by side with the headword page. Word entry
This pair ranks #361,320 of 530,003 scored English confusable pairs in this corpus vintage. Corpus statistics
"arse" and "ASA" also get mixed up with nearby pairs, the highest-scored neighbour is "ASA vs Asta". Nearby pair
Recorded mistypes exist for at least one side of this pair, useful when a spell-checker or OCR lands on the wrong form. See mistypes

Confusion rank #361,320 of 530,003 scored English pairs, corpus vintage 2026-09-03, not spelling advice.