Which to use
“aft” is a noun and “auto” is an adjective - they look or sound alike but fill different roles in a sentence.
- #17,285
- “aft” frequency rank
- #3,099
- “auto” frequency rank
- 20384
- confusion score
Side-by-Side Comparison
| Feature | aft | auto |
|---|---|---|
| Definition | The rear part (after end) of a ship or other vessel. | Clipping of automatic (of a gearbox/transmission). |
Where the eye mixes aft and auto
Muted = shared; highlighted = the visual trap. They share 2 letters in sequence.
Visual trap between aft and auto
These two trip readers on the page rather than in the ear: aft is /ɑːft/ while auto is /ˈɔːtəʊ/. 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 adjective), which is usually the fastest check. Our composite confusion score for this pair is 20384, 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/. auto is at rank #3,099, tagged as anadj, pronounced /ˈɔːtəʊ/.
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 20384, this pair ranks #431,473 of 530,003 scored English confusable pairs - a relatively easy-to-tell-apart pair.
Orthographic DNA of aft vs auto
Shared letters: at. Private to "aft": f. Private to "auto": ou.
"aft" · 3 letters · shape VCC · "auto" · 4 letters · shape VVCV
Known mistypes of this pair
- auto ← atuo · auot · autto · uato
Frequently Asked Questions
Do "aft" and "auto" mean the same thing in a sentence?
Which is more common, "aft" or "auto"?
What to do next
Pronunciation already separates them, if the page still looks alike, the dictionary links below settle it.
- Full dictionary entry for "aft" with definition, IPA, and generated misspellings. Word entry
- Full dictionary entry for "auto" - compare definitions side by side with the headword page. Word entry
- This pair ranks #431,473 of 530,003 scored English confusable pairs in this corpus vintage. Corpus statistics
- "aft" and "auto" also get mixed up with nearby pairs, the highest-scored neighbour is "aft 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 #431,473 of 530,003 scored English pairs, corpus vintage 2026-09-03, not spelling advice.