Which to use
“tonto” is an adjective and “tostão” is a noun - they look or sound alike but fill different roles in a sentence.
- #19,014
- “tonto” frequency rank
- #27,305
- “tostão” frequency rank
- 46319
- confusion score
Side-by-Side Comparison
| Feature | tonto | tostão |
|---|---|---|
| Definition | que sente ou tem tonturas | antiga moeda de níquel de cem réis |
Where the eye mixes tonto and tostão
Muted = shared; highlighted = the visual trap. They share 4 letters in sequence. tonto runs 5 letters (CVCCV) against tostão's 6 (CVCCVV) - the length gap alone is often enough to separate them once you know to check it.
Why the eye confuses tonto with tostão
These two trip readers on the page rather than in the ear: tonto is /ˈtõ.tu/ while tostão is /tuʃ.ˈtɐ̃w̃/. 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 (adjective vs noun), which is usually the fastest check. Our composite confusion score for this pair is 46319, derived from the frequency rank of both members and their visual similarity.
tonto is recorded at frequency rank #19,014, classified as anadj, pronounced /ˈtõ.tu/. tostão is at rank #27,305, tagged as anoun, pronounced /tuʃ.ˈtɐ̃w̃/.
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 46319, this pair ranks #19,019 of 75,631 scored Portuguese confusable pairs - among the most confusable pairs.
Orthographic DNA of tonto vs tostão
Shared letters: ot. Private to "tonto": n. Private to "tostão": sã.
"tonto" · 5 letters · shape CVCCV · "tostão" · 6 letters · shape CVCCVV
Known mistypes of this pair
- tonto ← otnto · tnoto · tonnto · tonot · tontto · totno · ttonto
Frequently Asked Questions
Can "tonto" and "tostão" be used interchangeably?
Which is more common, "tonto" or "tostão"?
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 "tonto" with definition, IPA, and generated misspellings. Word entry
- Full dictionary entry for "tostão" - compare definitions side by side with the headword page. Word entry
- This pair ranks #19,019 of 75,631 scored Portuguese confusable pairs in this corpus vintage. Corpus statistics
- "tonto" and "tostão" also get mixed up with nearby pairs, the highest-scored neighbour is "tosa vs tostão". 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 #19,019 of 75,631 scored Portuguese pairs, corpus vintage 2026-09-03, not spelling advice.