Which to use
“aft” is a noun and “as” is an adverb - they look or sound alike but fill different roles in a sentence.
- #17,285
- “aft” frequency rank
- #18
- “as” frequency rank
- 17303
- confusion score
Side-by-Side Comparison
| Feature | aft | as |
|---|---|---|
| Definition | The rear part (after end) of a ship or other vessel. | To such an extent or degree; to the same extent or degree. |
Where the eye mixes aft and as
Muted = shared; highlighted = the visual trap. They share 1 letter in sequence.
Why the eye confuses aft with as
These two trip readers on the page rather than in the ear: aft is /ɑːft/ while as is /əz/. 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 adverb), which is usually the fastest check. Our composite confusion score for this pair is 17303, derived from the frequency rank of both members and their visual similarity.
aft is recorded at frequency rank #17,285, classified as anoun, pronounced /ɑːft/. as is at rank #18, tagged as anadv, pronounced /əz/.
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 17303, this pair ranks #452,312 of 530,003 scored English confusable pairs - a relatively easy-to-tell-apart pair.
Orthographic DNA of aft vs as
Shared letters: a. Private to "aft": ft. Private to "as": s.
"aft" · 3 letters · shape VCC · "as" · 2 letters · shape VC
Frequently Asked Questions
Is swapping "aft" for "as" ever safe?
Frequency check: "aft" vs "as" - which ranks higher?
What to do next
Eye-level mix-up between "aft" and "as" is sorted above. Next: full entries or other pairs that share a letter shape.
- Full dictionary entry for "aft" 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 #452,312 of 530,003 scored English confusable pairs in this corpus vintage. Corpus statistics
- "aft" and "as" also get mixed up with nearby pairs, the highest-scored neighbour is "aft vs Asta". Nearby pair
Confusion rank #452,312 of 530,003 scored English pairs, corpus vintage 2026-09-03, not spelling advice.