fou vs fun, What's the Difference?

Which to use

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

#48,244
“fou” frequency rank: #502
“fun” frequency rank: 48746
confusion score

Side-by-Side Comparison

Feature	fou	fun
Definition	Drunk.	Amusement, enjoyment or pleasure.

Letter map: fou vs fun

Shared letters muted; letters that set fou and fun apart highlighted. Shared run: 2. fou (CVV) and fun (CVC) run the same length but a different consonant-vowel pattern - the shape difference is usually the fastest tell.

3 ch

fou

3 ch

fun

Grammar separator: fou vs fun

Our dataset has no pronunciation recorded for both members, so the reliable separator here is grammatical: fou is anadjective and funanoun. On the page they share most of their letters but differ in 2 positions. Our composite confusion score for this pair is 48746, derived from the frequency rank of both members and their visual similarity.

fou is recorded at frequency rank #48,244, classified as anadj. fun is at rank #502, tagged as anoun, pronounced /fʌn/.

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 48746, this pair ranks #190,145 of 530,003 scored English confusable pairs - roughly mid-pack for confusability.

Orthographic DNA of fou vs fun

Shared letters: fu. Private to "fou": o. Private to "fun": n.

"fou" · 3 letters · shape CVV · "fun" · 3 letters · shape CVC

Frequently Asked Questions

Do "fou" and "fun" mean the same thing in a sentence?

No - they are not even the same part of speech. "fou" is an adjective and "fun" a noun, so a sentence built for one is usually ungrammatical with the other.

In ordinary English text, does "fou" or "fun" show up more?

"fun" is the more common of the two: it sits at frequency rank #502 in our English list, against #48,244 for "fou". That is a wide gap, so in ordinary text the rarer spelling is the one worth double-checking.

After this comparison

You've compared "fou" and "fun". Here's where to go from here.

Full dictionary entry for "fou" with definition, IPA, and generated misspellings. Word entry
Full dictionary entry for "fun" - compare definitions side by side with the headword page. Word entry
This pair ranks #190,145 of 530,003 scored English confusable pairs in this corpus vintage. Corpus statistics
"fou" and "fun" also get mixed up with nearby pairs, the highest-scored neighbour is "FOMO vs fou". Nearby pair

Confusion rank #190,145 of 530,003 scored English pairs, corpus vintage 2026-09-03, not spelling advice.