Which to use
“foca” is an adjective and “foi” is a verb - they look or sound alike but fill different roles in a sentence.
- #8,772
- “foca” frequency rank
- #26
- “foi” frequency rank
- 8798
- confusion score
Side-by-Side Comparison
| Feature | foca | foi |
|---|---|---|
| Definition | forma atenuada de, e o mesmo que foda | terceira pessoa do singular do pretérito perfeito do indicativo do verbo ser |
Where the eye mixes foca and foi
Muted = shared; highlighted = the visual trap. They share 2 letters in sequence.
Why the eye confuses foca with foi
These two trip readers on the page rather than in the ear: foca is /ˈfɔ.kɐ/ while foi is /ˈfoj/. 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 verb), which is usually the fastest check. Our composite confusion score for this pair is 8798, derived from the frequency rank of both members and their visual similarity.
foca is recorded at frequency rank #8,772, classified as anadj, pronounced /ˈfɔ.kɐ/. foi is at rank #26, tagged as averb, pronounced /ˈfoj/.
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 8798, this pair ranks #64,850 of 75,631 scored Portuguese confusable pairs - a relatively easy-to-tell-apart pair.
Orthographic DNA of foca vs foi
Shared letters: fo. Private to "foca": ac. Private to "foi": i.
"foca" · 4 letters · shape CVCV · "foi" · 3 letters · shape CVV
Known mistypes of this pair
- foca ← fcoa · ffoca · foac · focca · ofca
Frequently Asked Questions
Is swapping "foca" for "foi" ever safe?
Frequency check: "foca" vs "foi" - which ranks higher?
What to do next
Eye-level mix-up between "foca" and "foi" is sorted above. Next: full entries or other pairs that share a letter shape.
- Full dictionary entry for "foca" with definition, IPA, and generated misspellings. Word entry
- Full dictionary entry for "foi" - compare definitions side by side with the headword page. Word entry
- This pair ranks #64,850 of 75,631 scored Portuguese confusable pairs in this corpus vintage. Corpus statistics
- "foca" and "foi" also get mixed up with nearby pairs, the highest-scored neighbour is "foca vs fosco". 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 #64,850 of 75,631 scored Portuguese pairs, corpus vintage 2026-09-03, not spelling advice.