Which to use
“reação” and “rotação” are a confusable Portuguese pair: similar on the page, but distinct in meaning, check the gloss before you choose.
- #1,864
- “reação” frequency rank
- #11,342
- “rotação” frequency rank
- 13206
- confusion score
Side-by-Side Comparison
| Feature | reação | rotação |
|---|---|---|
| Definition | ação provocada em razão de uma outra anteriormente ocorrida | ato ou efeito de rodar |
Where the eye mixes reação and rotação
Muted = shared; highlighted = the visual trap. They share 5 letters in sequence. reação runs 6 letters (CVVCVV) against rotação's 7 (CVCVCVV) - the length gap alone is often enough to separate them once you know to check it.
Visual trap between reação and rotação
A purely visual mix-up. reação (/ʀja.ˈsɐ̃w̃/) and rotação (/Ru.tɐ.ˈsɐ̃w̃/) are said differently, so reading them aloud is the quickest way to catch the wrong one. On the page they stay close: they differ by 1 letter(s) in length. Our composite confusion score for this pair is 13206, derived from the frequency rank of both members and their visual similarity.
reação is recorded at frequency rank #1,864, classified as anoun, pronounced /ʀja.ˈsɐ̃w̃/. rotação is at rank #11,342, tagged as anoun, pronounced /Ru.tɐ.ˈsɐ̃w̃/.
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 13206, this pair ranks #59,217 of 75,631 scored Portuguese confusable pairs - a relatively easy-to-tell-apart pair.
Orthographic DNA of reação vs rotação
Shared letters: aorãç. Private to "reação": e. Private to "rotação": t.
"reação" · 6 letters · shape CVVCVV · "rotação" · 7 letters · shape CVCVCVV
Frequently Asked Questions
Can "reação" and "rotação" be used interchangeably?
Which is more common, "reação" or "rotação"?
After this comparison
Pronunciation already separates them, if the page still looks alike, the dictionary links below settle it.
- Full dictionary entry for "reação" with definition, IPA, and generated misspellings. Word entry
- Full dictionary entry for "rotação" - compare definitions side by side with the headword page. Word entry
- This pair ranks #59,217 of 75,631 scored Portuguese confusable pairs in this corpus vintage. Corpus statistics
- "reação" and "rotação" also get mixed up with nearby pairs, the highest-scored neighbour is "reação vs refração". Nearby pair
Confusion rank #59,217 of 75,631 scored Portuguese pairs, corpus vintage 2026-09-03, not spelling advice.