Which to use
“ao” is a contraction and “auto” is a noun - they look or sound alike but fill different roles in a sentence.
- #21,556
- “ao” frequency rank
- #871
- “auto” frequency rank
- 22427
- confusion score
Side-by-Side Comparison
| Feature | ao | auto |
|---|---|---|
| Definition | Contracción de la preposición a ("a") y el artículo o ("el"): (al). | Vehículo de cuatro ruedas, cerrado, con asientos, propulsado por un motor de combustión o eléctrico, destinado al transporte de una a cinco personas. |
Where the eye mixes ao and auto
Muted = shared; highlighted = the visual trap. They share 2 letters in sequence.
Why the eye confuses ao with auto
These two trip readers on the page rather than in the ear: ao is [ɔ] while auto is [ˈawt̪o]. Spoken aloud the problem disappears. In writing it persists, because they differ by 2 letter(s) in length, and the parts of speech differ too (contraction vs noun), which is usually the fastest check. Our composite confusion score for this pair is 22427, derived from the frequency rank of both members and their visual similarity.
ao is recorded at frequency rank #21,556, classified as acontraction, pronounced [ɔ]. auto is at rank #871, tagged as anoun, pronounced [ˈawt̪o].
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 22427, this pair ranks #250,392 of 323,831 scored Spanish confusable pairs - a relatively easy-to-tell-apart pair.
Orthographic DNA of ao vs auto
Shared letters: ao. Private to "ao": -. Private to "auto": tu.
"ao" · 2 letters · shape VV · "auto" · 4 letters · shape VVCV
Known mistypes of this pair
- auto ← atuo · auot · autto · uato
Frequently Asked Questions
Do "ao" and "auto" mean the same thing in a sentence?
In ordinary Spanish text, does "ao" or "auto" show up more?
What to do next
Pronunciation already separates them, if the page still looks alike, the dictionary links below settle it.
- Full dictionary entry for "ao" 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 #250,392 of 323,831 scored Spanish confusable pairs in this corpus vintage. Corpus statistics
- "ao" and "auto" also get mixed up with nearby pairs, the highest-scored neighbour is "alió vs ao". 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 #250,392 of 323,831 scored Spanish pairs, corpus vintage 2026-09-03, not spelling advice.