Which to use
“rio” is a noun and “run” is a verb - they look or sound alike but fill different roles in a sentence.
- #173
- “rio” frequency rank
- #8,681
- “run” frequency rank
- 8854
- confusion score
Side-by-Side Comparison
| Feature | rio | run |
|---|---|---|
| Definition | curso por onde passa água doce continuamente (ou durante épocas específicas do ano) | correr |
Where the eye mixes rio and run
Muted = shared; highlighted = the visual trap. They share 1 letter in sequence.
Look-alike desk: rio vs run
These two trip readers on the page rather than in the ear: rio is /ʁi.u/ [ʁiu̯] while run is /ˈɹʌn/. 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 verb), which is usually the fastest check. Our composite confusion score for this pair is 8854, 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]. run is at rank #8,681, tagged as averb, pronounced /ˈɹʌn/.
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 8854, this pair ranks #64,773 of 75,631 scored Portuguese confusable pairs - a relatively easy-to-tell-apart pair.
Orthographic DNA of rio vs run
Shared letters: r. Private to "rio": io. Private to "run": nu.
"rio" · 3 letters · shape CVV · "run" · 3 letters · shape CVC
Frequently Asked Questions
Do "rio" and "run" mean the same thing in a sentence?
Frequency check: "rio" vs "run" - which ranks higher?
What to do next
Eye-level mix-up between "rio" and "run" is sorted above. Next: full entries or other pairs that share a letter shape.
- Full dictionary entry for "rio" with definition, IPA, and generated misspellings. Word entry
- Full dictionary entry for "run" - compare definitions side by side with the headword page. Word entry
- This pair ranks #64,773 of 75,631 scored Portuguese confusable pairs in this corpus vintage. Corpus statistics
- "rio" and "run" also get mixed up with nearby pairs, the highest-scored neighbour is "run vs rust". Nearby pair
Confusion rank #64,773 of 75,631 scored Portuguese pairs, corpus vintage 2026-09-03, not spelling advice.