Which to use
“fu” is an intj and “fume” is a noun - they look or sound alike but fill different roles in a sentence.
- #8,543
- “fu” frequency rank
- #45,384
- “fume” frequency rank
- 53927
- confusion score
Side-by-Side Comparison
| Feature | fu | fume |
|---|---|---|
| Definition | Initialism of fuck you. | A gas or vapour/vapor that is strong-smelling or dangerous to inhale. |
Letter map: fu vs fume
Shared letters muted; letters that set fu and fume apart highlighted. Shared run: 2.
Grammar separator: fu vs fume
Our dataset has no pronunciation recorded for both members, so the reliable separator here is grammatical: fu is anintj and fumeanoun. On the page they differ by 2 extra letter(s) - “fu” sits inside “fume”. Our composite confusion score for this pair is 53927, derived from the frequency rank of both members and their visual similarity.
fu is recorded at frequency rank #8,543, classified as anintj. fume is at rank #45,384, tagged as anoun, pronounced /fjuːm/.
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 53927, this pair ranks #145,064 of 530,003 scored English confusable pairs - roughly mid-pack for confusability.
Orthographic DNA of fu vs fume
Shared letters: fu. Private to "fu": -. Private to "fume": em.
"fu" · 2 letters · shape CV · "fume" · 4 letters · shape CVCV
Known mistypes of this pair
- fume ← ffume · fmue · fuem · fumme · ufme
Frequently Asked Questions
Is swapping "fu" for "fume" ever safe?
Frequency check: "fu" vs "fume" - which ranks higher?
Useful next steps
Pair "fu" vs "fume" is on the table, pick a follow-up below.
- Full dictionary entry for "fu" with definition, IPA, and generated misspellings. Word entry
- Full dictionary entry for "fume" - compare definitions side by side with the headword page. Word entry
- This pair ranks #145,064 of 530,003 scored English confusable pairs in this corpus vintage. Corpus statistics
- "fu" and "fume" also get mixed up with nearby pairs, the highest-scored neighbour is "FOMO vs fume". 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 #145,064 of 530,003 scored English pairs, corpus vintage 2026-09-03, not spelling advice.