Which to use
“acerto” is a noun and “alerta” is an adjective - they look or sound alike but fill different roles in a sentence.
- #9,134
- “acerto” frequency rank
- #2,551
- “alerta” frequency rank
- 11685
- confusion score
Side-by-Side Comparison
| Feature | acerto | alerta |
|---|---|---|
| Definition | ato ou efeito de fazer certo ou realizar corretamente | que está em estado de prontidão |
Where the eye mixes acerto and alerta
Muted = shared; highlighted = the visual trap. They share 4 letters in sequence.
Why the eye confuses acerto with alerta
These two trip readers on the page rather than in the ear: acerto is /ɐ.ˈseɾ.tu/ while alerta is /a.ˈlɛɾ.tɐ/. Spoken aloud the problem disappears. In writing it persists, because they share most of their letters but differ in 2 positions, and the parts of speech differ too (noun vs adjective), which is usually the fastest check. Our composite confusion score for this pair is 11685, derived from the frequency rank of both members and their visual similarity.
acerto is recorded at frequency rank #9,134, classified as anoun, pronounced /ɐ.ˈseɾ.tu/. alerta is at rank #2,551, tagged as anadj, pronounced /a.ˈlɛɾ.tɐ/.
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 11685, this pair ranks #61,118 of 75,631 scored Portuguese confusable pairs - a relatively easy-to-tell-apart pair.
Orthographic DNA of acerto vs alerta
Shared letters: aert. Private to "acerto": co. Private to "alerta": l.
"acerto" · 6 letters · shape VCVCCV · "alerta" · 6 letters · shape VCVCCV
Known mistypes of this pair
Frequently Asked Questions
Is swapping "acerto" for "alerta" ever safe?
Frequency check: "acerto" vs "alerta" - 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 "acerto" with definition, IPA, and generated misspellings. Word entry
- Full dictionary entry for "alerta" - compare definitions side by side with the headword page. Word entry
- This pair ranks #61,118 of 75,631 scored Portuguese confusable pairs in this corpus vintage. Corpus statistics
- "acerto" and "alerta" also get mixed up with nearby pairs, the highest-scored neighbour is "aceno vs acerto". 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 #61,118 of 75,631 scored Portuguese pairs, corpus vintage 2026-09-03, not spelling advice.