Which to use
“fil” is a noun and “fon” is an adjective - they look or sound alike but fill different roles in a sentence.
- #35,592
- “fil” frequency rank
- #44,372
- “fon” frequency rank
- 79964
- confusion score
Side-by-Side Comparison
| Feature | fil | fon |
|---|---|---|
| Definition | fio | relativo à etnia dos fons |
Where the eye mixes fil and fon
Muted = shared; highlighted = the visual trap. They share 1 letter in sequence. fil and fon follow the identical consonant-vowel pattern (CVC). Same shape at a glance is often the real trap, independent of shared letters.
Look-alike desk: fil vs fon
These two trip readers on the page rather than in the ear: fil is /fil/ while fon is /ˈfõ/. 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 adjective), which is usually the fastest check. Our composite confusion score for this pair is 79964, derived from the frequency rank of both members and their visual similarity.
fil is recorded at frequency rank #35,592, classified as anoun, pronounced /fil/. fon is at rank #44,372, tagged as anadj, pronounced /ˈfõ/.
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 79964, this pair ranks #1,408 of 75,631 scored Portuguese confusable pairs - among the most confusable pairs.
Orthographic DNA of fil vs fon
Shared letters: f. Private to "fil": il. Private to "fon": no.
"fil" · 3 letters · shape CVC · "fon" · 3 letters · shape CVC
Frequently Asked Questions
Do "fil" and "fon" mean the same thing in a sentence?
Which is more common, "fil" or "fon"?
Useful next steps
Pronunciation already separates them, if the page still looks alike, the dictionary links below settle it.
- Full dictionary entry for "fil" with definition, IPA, and generated misspellings. Word entry
- Full dictionary entry for "fon" - compare definitions side by side with the headword page. Word entry
- This pair ranks #1,408 of 75,631 scored Portuguese confusable pairs in this corpus vintage. Corpus statistics
- "fil" and "fon" also get mixed up with nearby pairs, the highest-scored neighbour is "fern vs fon". Nearby pair
Confusion rank #1,408 of 75,631 scored Portuguese pairs, corpus vintage 2026-09-03, not spelling advice.