felvsfloWhich spelling fits?

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

Which to use

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

#42,931
“fel” frequency rank
#26,750
“flo” frequency rank
69681
confusion score

Side-by-Side Comparison

Feature fel flo
Definition bile, bílis respirar.

Where the eye mixes fel and flo

Muted = shared; highlighted = the visual trap. They share 2 letters in sequence.

3 ch
fel
3 ch
flo

Visual trap between fel and flo

These two trip readers on the page rather than in the ear: fel is /ˈfɛɫ/ while flo is /floː/. 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 verb), which is usually the fastest check. Our composite confusion score for this pair is 69681, derived from the frequency rank of both members and their visual similarity.

fel is recorded at frequency rank #42,931, classified as anoun, pronounced /ˈfɛɫ/. flo is at rank #26,750, tagged as averb, pronounced /floː/.

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 69681, this pair ranks #3,878 of 75,631 scored Portuguese confusable pairs - among the most confusable pairs.

Orthographic DNA of fel vs flo

Shared letters: fl. Private to "fel": e. Private to "flo": o.

"fel" · 3 letters · shape CVC  ·  "flo" · 3 letters · shape CCV

Frequently Asked Questions

Can "fel" and "flo" be used interchangeably?
No - they are not even the same part of speech. "fel" is a noun and "flo" a verb, so a sentence built for one is usually ungrammatical with the other.
Which is more common, "fel" or "flo"?
"flo" is the more common of the two: it sits at frequency rank #26,750 in our Portuguese list, against #42,931 for "fel". The two are close in frequency, so neither is a safe default; check the meaning rather than guessing.

Useful next steps

Visual near-miss handled. Browse the word pages or a neighbour when the next look-alike shows up.

  • Full dictionary entry for "fel" with definition, IPA, and generated misspellings. Word entry
  • Full dictionary entry for "flo" - compare definitions side by side with the headword page. Word entry
  • This pair ranks #3,878 of 75,631 scored Portuguese confusable pairs in this corpus vintage. Corpus statistics
  • "fel" and "flo" also get mixed up with nearby pairs, the highest-scored neighbour is "fel vs fern". Nearby pair

Confusion rank #3,878 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