Which to use
“doi” and “dois” are a confusable Portuguese pair: similar on the page, but distinct in meaning, check the gloss before you choose.
- #13,272
- “doi” frequency rank
- #109
- “dois” frequency rank
- 13381
- confusion score
Side-by-Side Comparison
| Feature | doi | dois |
|---|---|---|
| Definition | dois; representado pelo algarismo hindu-arábico 2 | número equivalente a um mais um; cardinalidade de um conjunto que contenha um elemento e um outro elemento distinto; representado pelo símbolo 2 (algarismos indo-arábicos) ou II (algarismos romanos); seu feminino é duas |
Where the eye mixes doi and dois
Muted = shared; highlighted = the visual trap. They share 3 letters in sequence.
Why the eye confuses doi with dois
A purely visual mix-up. doi (/doj/) and dois (/ˈdojʃ/) 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 extra letter(s) - “doi” sits inside “dois”. Our composite confusion score for this pair is 13381, 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/. dois is at rank #109, tagged as anum, pronounced /ˈdojʃ/.
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 13381, this pair ranks #58,979 of 75,631 scored Portuguese confusable pairs - a relatively easy-to-tell-apart pair.
Orthographic DNA of doi vs dois
Shared letters: dio. Private to "doi": -. Private to "dois": s.
"doi" · 3 letters · shape CVV · "dois" · 4 letters · shape CVVC
Known mistypes of this pair
- dois ← ddois · dios · doiss · dosi · odis
Frequently Asked Questions
Is swapping "doi" for "dois" ever safe?
In ordinary Portuguese text, does "doi" or "dois" show up more?
What to do next
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 "dois" - compare definitions side by side with the headword page. Word entry
- This pair ranks #58,979 of 75,631 scored Portuguese confusable pairs in this corpus vintage. Corpus statistics
- "doi" and "dois" also get mixed up with nearby pairs, the highest-scored neighbour is "dat vs doi". 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 #58,979 of 75,631 scored Portuguese pairs, corpus vintage 2026-09-03, not spelling advice.