Which to use
“fio” is a noun and “foi” is a verb - they look or sound alike but fill different roles in a sentence.
- #3,904
- “fio” frequency rank
- #26
- “foi” frequency rank
- 3930
- confusion score
Side-by-Side Comparison
| Feature | fio | foi |
|---|---|---|
| Definition | linha | terceira pessoa do singular do pretérito perfeito do indicativo do verbo ser |
Letter map: fio vs foi
Shared letters muted; letters that set fio and foi apart highlighted. Shared run: 2.
Part-of-speech tell for fio / foi
Our dataset has no pronunciation recorded for both members, so the reliable separator here is grammatical: fio is anoun and foiaverb. On the page they differ only by swapping two adjacent letters (io ↔ oi) - a transposition the eye reads straight past. Our composite confusion score for this pair is 3930, derived from the frequency rank of both members and their visual similarity.
fio is recorded at frequency rank #3,904, classified as anoun. 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 3930, this pair ranks #71,139 of 75,631 scored Portuguese confusable pairs - a relatively easy-to-tell-apart pair.
Orthographic DNA of fio vs foi
Shared letters: fio. Private to "fio": -. Private to "foi": -.
"fio" · 3 letters · shape CVV · "foi" · 3 letters · shape CVV
Frequently Asked Questions
Can "fio" and "foi" be used interchangeably?
Frequency check: "fio" vs "foi" - which ranks higher?
After this comparison
You've compared "fio" and "foi". Here's where to go from here.
- Full dictionary entry for "fio" 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 #71,139 of 75,631 scored Portuguese confusable pairs in this corpus vintage. Corpus statistics
- "fio" and "foi" also get mixed up with nearby pairs, the highest-scored neighbour is "filão vs fio". Nearby pair
Confusion rank #71,139 of 75,631 scored Portuguese pairs, corpus vintage 2026-09-03, not spelling advice.