Which to use
“doi” is a num and “duo” is a noun - they look or sound alike but fill different roles in a sentence.
- #13,272
- “doi” frequency rank
- #15,317
- “duo” frequency rank
- 28589
- confusion score
Side-by-Side Comparison
| Feature | doi | duo |
|---|---|---|
| Definition | dois; representado pelo algarismo hindu-arábico 2 | grupo de duas pessoas que atuam conjuntamente |
Where the eye mixes doi and duo
Muted = shared; highlighted = the visual trap. They share 2 letters in sequence.
Why the eye confuses doi with duo
These two trip readers on the page rather than in the ear: doi is /doj/ while duo is [du.o], Plural: [du.os]. 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 (num vs noun), which is usually the fastest check. Our composite confusion score for this pair is 28589, derived from the frequency rank of both members and their visual similarity.
doi is recorded at frequency rank #13,272, classified as anum, pronounced /doj/. duo is at rank #15,317, tagged as anoun, pronounced [du.o], Plural: [du.os].
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 28589, this pair ranks #40,218 of 75,631 scored Portuguese confusable pairs - roughly mid-pack for confusability.
Orthographic DNA of doi vs duo
Shared letters: do. Private to "doi": i. Private to "duo": u.
"doi" · 3 letters · shape CVV · "duo" · 3 letters · shape CVV
Frequently Asked Questions
Do "doi" and "duo" mean the same thing in a sentence?
Frequency check: "doi" vs "duo" - 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 "doi" with definition, IPA, and generated misspellings. Word entry
- Full dictionary entry for "duo" - compare definitions side by side with the headword page. Word entry
- This pair ranks #40,218 of 75,631 scored Portuguese confusable pairs in this corpus vintage. Corpus statistics
- "doi" and "duo" also get mixed up with nearby pairs, the highest-scored neighbour is "dat vs duo". Nearby pair
Confusion rank #40,218 of 75,631 scored Portuguese pairs, corpus vintage 2026-09-03, not spelling advice.