Which to use
“dia” is a noun and “doi” is a num - they look or sound alike but fill different roles in a sentence.
- #51
- “dia” frequency rank
- #13,272
- “doi” frequency rank
- 13323
- confusion score
Side-by-Side Comparison
| Feature | dia | doi |
|---|---|---|
| Definition | espaço de tempo correspondente à rotação da Terra, que equivale a 23 horas, 56 minutos e 4 segundos | dois; representado pelo algarismo hindu-arábico 2 |
Where the eye mixes dia and doi
Muted = shared; highlighted = the visual trap. They share 2 letters in sequence.
Why the eye confuses dia with doi
These two trip readers on the page rather than in the ear: dia is /'dʒi.a/ while doi is /doj/. 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 num), which is usually the fastest check. Our composite confusion score for this pair is 13323, derived from the frequency rank of both members and their visual similarity.
dia is recorded at frequency rank #51, classified as anoun, pronounced /'dʒi.a/. doi is at rank #13,272, tagged as anum, pronounced /doj/.
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 13323, this pair ranks #59,058 of 75,631 scored Portuguese confusable pairs - a relatively easy-to-tell-apart pair.
Orthographic DNA of dia vs doi
Shared letters: di. Private to "dia": a. Private to "doi": o.
"dia" · 3 letters · shape CVV · "doi" · 3 letters · shape CVV
Frequently Asked Questions
Do "dia" and "doi" mean the same thing in a sentence?
Frequency check: "dia" vs "doi" - which ranks higher?
After this comparison
Eye-level mix-up between "dia" and "doi" is sorted above. Next: full entries or other pairs that share a letter shape.
- Full dictionary entry for "dia" with definition, IPA, and generated misspellings. Word entry
- Full dictionary entry for "doi" - compare definitions side by side with the headword page. Word entry
- This pair ranks #59,058 of 75,631 scored Portuguese confusable pairs in this corpus vintage. Corpus statistics
- "dia" and "doi" also get mixed up with nearby pairs, the highest-scored neighbour is "dat vs doi". Nearby pair
Confusion rank #59,058 of 75,631 scored Portuguese pairs, corpus vintage 2026-09-03, not spelling advice.