a's vs AF, What's the Difference?

Which to use

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

#15,090
“a's” frequency rank: #7,413
“AF” frequency rank: 22503
confusion score

Side-by-Side Comparison

Feature	a's	AF
Definition	plural of the letter a	Initialism of air force.

Where the eye mixes a's and AF

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

3 ch

a's

2 ch

Look-alike desk: a's vs AF

A purely visual mix-up. a's (/ˈeɪz/) and AF (/eɪ̯ˈɛf/) are said differently, so reading them aloud is the quickest way to catch the wrong one. On the page they stay close: they differ by 1 letter(s) in length. Our composite confusion score for this pair is 22503, derived from the frequency rank of both members and their visual similarity.

a's is recorded at frequency rank #15,090, classified as anoun, pronounced /ˈeɪz/. AF is at rank #7,413, tagged as anoun, pronounced /eɪ̯ˈɛf/.

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 22503, this pair ranks #416,124 of 530,003 scored English confusable pairs - a relatively easy-to-tell-apart pair.

Orthographic DNA of a's vs AF

Shared letters: a. Private to "a's": s. Private to "AF": f.

"a's" · 2 letters · shape VC · "AF" · 2 letters · shape VC

Frequently Asked Questions

Is swapping "a's" for "AF" ever safe?

No. They are said differently (/ˈeɪz/ versus /eɪ̯ˈɛf/) and carry different meanings; reading the sentence aloud is usually enough to catch the wrong one.

In ordinary English text, does "a's" or "AF" show up more?

"AF" is the more common of the two: it sits at frequency rank #7,413 in our English list, against #15,090 for "a's". The two are close in frequency, so neither is a safe default; check the meaning rather than guessing.

After this comparison

Eye-level mix-up between "a's" and "AF" is sorted above. Next: full entries or other pairs that share a letter shape.

Full dictionary entry for "a's" 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 #416,124 of 530,003 scored English confusable pairs in this corpus vintage. Corpus statistics
"a's" and "AF" also get mixed up with nearby pairs, the highest-scored neighbour is "a's vs amb". Nearby pair

Confusion rank #416,124 of 530,003 scored English pairs, corpus vintage 2026-09-03, not spelling advice.