fullvsfunWhich spelling fits?

Quick tell: full is a adverb, fun is an adjective, so they fill different roles in a sentence.

Which to use

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

#6,066
“full” frequency rank
#16,068
“fun” frequency rank
22134
confusion score

Side-by-Side Comparison

Feature full fun
Definition ver completamente divertido

Letter map: full vs fun

Shared letters muted; letters that set full and fun apart highlighted. Shared run: 2.

4 ch
full
3 ch
fun

Part-of-speech tell for full / fun

Our dataset has no pronunciation recorded for both members, so the reliable separator here is grammatical: full is anadverb and funanadjective. On the page they differ by 1 letter(s) in length. Our composite confusion score for this pair is 22134, derived from the frequency rank of both members and their visual similarity.

full is recorded at frequency rank #6,066, classified as anadv. fun is at rank #16,068, tagged as anadj, 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 22134, this pair ranks #47,978 of 75,631 scored Portuguese confusable pairs - roughly mid-pack for confusability.

Orthographic DNA of full vs fun

Shared letters: fu. Private to "full": l. Private to "fun": n.

"full" · 4 letters · shape CVCC  ·  "fun" · 3 letters · shape CVC

Known mistypes of this pair

  • fullffull · flul · ful · ufll

Frequently Asked Questions

Can "full" and "fun" be used interchangeably?
No - they are not even the same part of speech. "full" is an adverb and "fun" an adjective, so a sentence built for one is usually ungrammatical with the other.
In ordinary Portuguese text, does "full" or "fun" show up more?
"full" is the more common of the two: it sits at frequency rank #6,066 in our Portuguese list, against #16,068 for "fun". The two are close in frequency, so neither is a safe default; check the meaning rather than guessing.

What to do next

Pair "full" vs "fun" is on the table, pick a follow-up below.

  • Full dictionary entry for "full" 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 #47,978 of 75,631 scored Portuguese confusable pairs in this corpus vintage. Corpus statistics
  • "full" and "fun" also get mixed up with nearby pairs, the highest-scored neighbour is "fern vs fun". 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 #47,978 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