Which to use
“aca” is a noun and “au” is an intj - they look or sound alike but fill different roles in a sentence.
- #3,222
- “aca” frequency rank
- #7,821
- “au” frequency rank
- 11043
- confusion score
Side-by-Side Comparison
| Feature | aca | au |
|---|---|---|
| Definition | Residuo sólido indigerible del bolo alimenticio, que se excreta a través del ano. | Indica dolor. |
Where the eye mixes aca and au
Muted = shared; highlighted = the visual trap. They share 1 letter in sequence.
Look-alike desk: aca vs au
These two trip readers on the page rather than in the ear: aca is [ˈaka] while au is [ˈaw]. 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 intj), which is usually the fastest check. Our composite confusion score for this pair is 11043, derived from the frequency rank of both members and their visual similarity.
aca is recorded at frequency rank #3,222, classified as anoun, pronounced [ˈaka]. au is at rank #7,821, tagged as anintj, pronounced [ˈaw].
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 11043, this pair ranks #296,474 of 323,831 scored Spanish confusable pairs - a relatively easy-to-tell-apart pair.
Orthographic DNA of aca vs au
Shared letters: a. Private to "aca": c. Private to "au": u.
"aca" · 3 letters · shape VCV · "au" · 2 letters · shape VV
Frequently Asked Questions
Do "aca" and "au" mean the same thing in a sentence?
Frequency check: "aca" vs "au" - which ranks higher?
Useful next steps
Pronunciation already separates them, if the page still looks alike, the dictionary links below settle it.
- Full dictionary entry for "aca" with definition, IPA, and generated misspellings. Word entry
- Full dictionary entry for "au" - compare definitions side by side with the headword page. Word entry
- This pair ranks #296,474 of 323,831 scored Spanish confusable pairs in this corpus vintage. Corpus statistics
- "aca" and "au" also get mixed up with nearby pairs, the highest-scored neighbour is "atl vs au". Nearby pair
Confusion rank #296,474 of 323,831 scored Spanish pairs, corpus vintage 2026-09-03, not spelling advice.