Which to use
“oco” is an adjective and “otto” is a num - they look or sound alike but fill different roles in a sentence.
- #27,951
- “oco” frequency rank
- #11,925
- “otto” frequency rank
- 39876
- confusion score
Side-by-Side Comparison
| Feature | oco | otto |
|---|---|---|
| Definition | que não tem miolo | oito (8, VIII) |
Where the eye mixes oco and otto
Muted = shared; highlighted = the visual trap. They share 2 letters in sequence.
Why the eye confuses oco with otto
These two trip readers on the page rather than in the ear: oco is /ˈo.ku/ while otto is /ˈɔtto/. 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 num), which is usually the fastest check. Our composite confusion score for this pair is 39876, derived from the frequency rank of both members and their visual similarity.
oco is recorded at frequency rank #27,951, classified as anadj, pronounced /ˈo.ku/. otto is at rank #11,925, tagged as anum, pronounced /ˈɔtto/.
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 39876, this pair ranks #26,310 of 75,631 scored Portuguese confusable pairs - roughly mid-pack for confusability.
Orthographic DNA of oco vs otto
Shared letters: o. Private to "oco": c. Private to "otto": t.
"oco" · 3 letters · shape VCV · "otto" · 4 letters · shape VCCV
Known mistypes of this pair
- otto ← oto · otot · toto
Frequently Asked Questions
Can "oco" and "otto" be used interchangeably?
Frequency check: "oco" vs "otto" - which ranks higher?
Useful next steps
Visual near-miss handled. Browse the word pages or a neighbour when the next look-alike shows up.
- Full dictionary entry for "oco" with definition, IPA, and generated misspellings. Word entry
- Full dictionary entry for "otto" - compare definitions side by side with the headword page. Word entry
- This pair ranks #26,310 of 75,631 scored Portuguese confusable pairs in this corpus vintage. Corpus statistics
- "oco" and "otto" also get mixed up with nearby pairs, the highest-scored neighbour is "oco vs oni". 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 #26,310 of 75,631 scored Portuguese pairs, corpus vintage 2026-09-03, not spelling advice.