fanvsfonWhat's the difference?

Quick tell: fan is a noun, fon is an adjective, so they fill different roles in a sentence.

Which to use

“fan” is a noun and “fon” is an adjective - they look or sound alike but fill different roles in a sentence.

#10,358
“fan” frequency rank
#44,372
“fon” frequency rank
54730
confusion score

Side-by-Side Comparison

Feature fan fon
Definition fã relativo à etnia dos fons

Letter map: fan vs fon

Shared letters muted; letters that set fan and fon apart highlighted. Shared run: 2. fan and fon follow the identical consonant-vowel pattern (CVC). Same shape at a glance is often the real trap, independent of shared letters.

3 ch
fan
3 ch
fon

Role in the sentence - fan and fon

Our dataset has no pronunciation recorded for both members, so the reliable separator here is grammatical: fan is anoun and fonanadjective. On the page they differ by a single letter - a in “fan” becomes o in “fon”. Our composite confusion score for this pair is 54730, derived from the frequency rank of both members and their visual similarity.

fan is recorded at frequency rank #10,358, classified as anoun. 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 54730, this pair ranks #11,067 of 75,631 scored Portuguese confusable pairs - among the most confusable pairs.

Orthographic DNA of fan vs fon

Shared letters: fn. Private to "fan": a. Private to "fon": o.

"fan" · 3 letters · shape CVC  ·  "fon" · 3 letters · shape CVC

Frequently Asked Questions

Can "fan" and "fon" be used interchangeably?
No - they are not even the same part of speech. "fan" is a noun and "fon" an adjective, so a sentence built for one is usually ungrammatical with the other.
In ordinary Portuguese text, does "fan" or "fon" show up more?
"fan" is the more common of the two: it sits at frequency rank #10,358 in our Portuguese list, against #44,372 for "fon". The two are close in frequency, so neither is a safe default; check the meaning rather than guessing.

What to do next

Done with this confusable. These links stay specific to "fan" and "fon".

  • Full dictionary entry for "fan" 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 #11,067 of 75,631 scored Portuguese confusable pairs in this corpus vintage. Corpus statistics
  • "fan" and "fon" also get mixed up with nearby pairs, the highest-scored neighbour is "fern vs fon". Nearby pair

Confusion rank #11,067 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