Which to use
“rio” is a noun and “roxo” is an adjective - they look or sound alike but fill different roles in a sentence.
- #173
- “rio” frequency rank
- #8,106
- “roxo” frequency rank
- 8279
- confusion score
Side-by-Side Comparison
| Feature | rio | roxo |
|---|---|---|
| Definition | curso por onde passa água doce continuamente (ou durante épocas específicas do ano) | que tem uma cor que resulta da junção do encarnado com o azul |
Where the eye mixes rio and roxo
Muted = shared; highlighted = the visual trap. They share 2 letters in sequence.
Visual trap between rio and roxo
These two trip readers on the page rather than in the ear: rio is /ʁi.u/ [ʁiu̯] while roxo is /ˈRo.ʃu/. 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 8279, derived from the frequency rank of both members and their visual similarity.
rio is recorded at frequency rank #173, classified as anoun, pronounced /ʁi.u/ [ʁiu̯]. roxo is at rank #8,106, tagged as anadj, pronounced /ˈRo.ʃu/.
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 8279, this pair ranks #65,545 of 75,631 scored Portuguese confusable pairs - a relatively easy-to-tell-apart pair.
Orthographic DNA of rio vs roxo
Shared letters: or. Private to "rio": i. Private to "roxo": x.
"rio" · 3 letters · shape CVV · "roxo" · 4 letters · shape CVCV
Known mistypes of this pair
- roxo ← orxo · roox · roxxo · rroxo · rxoo
Frequently Asked Questions
Can "rio" and "roxo" be used interchangeably?
Frequency check: "rio" vs "roxo" - which ranks higher?
After this comparison
Visual near-miss handled. Browse the word pages or a neighbour when the next look-alike shows up.
- Full dictionary entry for "rio" with definition, IPA, and generated misspellings. Word entry
- Full dictionary entry for "roxo" - compare definitions side by side with the headword page. Word entry
- This pair ranks #65,545 of 75,631 scored Portuguese confusable pairs in this corpus vintage. Corpus statistics
- "rio" and "roxo" also get mixed up with nearby pairs, the highest-scored neighbour is "robe vs roxo". 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 #65,545 of 75,631 scored Portuguese pairs, corpus vintage 2026-09-03, not spelling advice.