Which to use
“rio” and “riso” are a confusable Portuguese pair: similar on the page, but distinct in meaning, check the gloss before you choose.
- #173
- “rio” frequency rank
- #10,434
- “riso” frequency rank
- 10607
- confusion score
Side-by-Side Comparison
| Feature | rio | riso |
|---|---|---|
| Definition | curso por onde passa água doce continuamente (ou durante épocas específicas do ano) | ato ou efeito de rir; demonstração clara e geralmente espontânea de alegria |
Where the eye mixes rio and riso
Muted = shared; highlighted = the visual trap. They share 3 letters in sequence.
Look-alike desk: rio vs riso
A purely visual mix-up. rio (/ʁi.u/ [ʁiu̯]) and riso (/ˈRi.zu/) 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 10607, 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]. riso is at rank #10,434, tagged as anoun, pronounced /ˈRi.zu/.
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 10607, this pair ranks #62,434 of 75,631 scored Portuguese confusable pairs - a relatively easy-to-tell-apart pair.
Orthographic DNA of rio vs riso
Shared letters: ior. Private to "rio": -. Private to "riso": s.
"rio" · 3 letters · shape CVV · "riso" · 4 letters · shape CVCV
Known mistypes of this pair
- riso ← irso · rios · risso · rriso · rsio
Frequently Asked Questions
Is swapping "rio" for "riso" ever safe?
Which is more common, "rio" or "riso"?
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 "riso" - compare definitions side by side with the headword page. Word entry
- This pair ranks #62,434 of 75,631 scored Portuguese confusable pairs in this corpus vintage. Corpus statistics
- "rio" and "riso" also get mixed up with nearby pairs, the highest-scored neighbour is "riso vs rust". 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 #62,434 of 75,631 scored Portuguese pairs, corpus vintage 2026-09-03, not spelling advice.