faiavsfuiConfusable pair

Quick tell: faia is a noun, fui is a verb, so they fill different roles in a sentence.

Which to use

“faia” is a noun and “fui” is a verb - they look or sound alike but fill different roles in a sentence.

#45,352
“faia” frequency rank
#365
“fui” frequency rank
45717
confusion score

Side-by-Side Comparison

Feature faia fui
Definition árvore alta e ramosa, geralmente da espécie Fagus sylvatica, e também o álamo ou choupo Populus nigra primeira pessoa do singular do pretérito perfeito simples do indicativo do verbo ir:

Where the eye mixes faia and fui

Muted = shared; highlighted = the visual trap. They share 2 letters in sequence. faia runs 4 letters (CVVV) against fui's 3 (CVV) - the length gap alone is often enough to separate them once you know to check it.

4 ch
faia
3 ch
fui

Look-alike desk: faia vs fui

These two trip readers on the page rather than in the ear: faia is /ˈfaj.ɐ/ while fui is /ˈfuj/. 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 (noun vs verb), which is usually the fastest check. Our composite confusion score for this pair is 45717, derived from the frequency rank of both members and their visual similarity.

faia is recorded at frequency rank #45,352, classified as anoun, pronounced /ˈfaj.ɐ/. fui is at rank #365, tagged as averb, pronounced /ˈfuj/.

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 45717, this pair ranks #19,678 of 75,631 scored Portuguese confusable pairs - roughly mid-pack for confusability.

Orthographic DNA of faia vs fui

Shared letters: fi. Private to "faia": a. Private to "fui": u.

"faia" · 4 letters · shape CVVV  ·  "fui" · 3 letters · shape CVV

Known mistypes of this pair

  • faia ← afia · faai · ffaia · fiaa

Frequently Asked Questions

Is swapping "faia" for "fui" ever safe?
No - they are not even the same part of speech. "faia" is a noun and "fui" a verb, so a sentence built for one is usually ungrammatical with the other.
Frequency check: "faia" vs "fui" - which ranks higher?
"fui" is the more common of the two: it sits at frequency rank #365 in our Portuguese list, against #45,352 for "faia". That is a wide gap, so in ordinary text the rarer spelling is the one worth double-checking.

Useful next steps

Pronunciation already separates them, if the page still looks alike, the dictionary links below settle it.

  • Full dictionary entry for "faia" with definition, IPA, and generated misspellings. Word entry
  • Full dictionary entry for "fui" - compare definitions side by side with the headword page. Word entry
  • This pair ranks #19,678 of 75,631 scored Portuguese confusable pairs in this corpus vintage. Corpus statistics
  • "faia" and "fui" also get mixed up with nearby pairs, the highest-scored neighbour is "faia vs fava". 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 #19,678 of 75,631 scored Portuguese pairs, corpus vintage 2026-09-03, not spelling advice.

Source: Wiktionary (via kaikki.org) Structured Wiktionary extract

Source: FrequencyWords open word-frequency list