Which to use
“flue” is a noun and “fut” is an intj - they look or sound alike but fill different roles in a sentence.
- #38,401
- “flue” frequency rank
- #44,798
- “fut” frequency rank
- 83199
- confusion score
Side-by-Side Comparison
| Feature | flue | fut |
|---|---|---|
| Definition | A pipe or duct that carries gaseous combustion products away from the point of combustion (such as a furnace). | Alternative form of 'sfoot. |
Letter map: flue vs fut
Shared letters muted; letters that set flue and fut apart highlighted. Shared run: 2. flue runs 4 letters (CCVV) against fut's 3 (CVC) - the length gap alone is often enough to separate them once you know to check it.
Role in the sentence - flue and fut
Our dataset has no pronunciation recorded for both members, so the reliable separator here is grammatical: flue is anoun and futanintj. On the page they differ by 1 letter(s) in length. Our composite confusion score for this pair is 83199, derived from the frequency rank of both members and their visual similarity.
flue is recorded at frequency rank #38,401, classified as anoun, pronounced /fluː/. fut is at rank #44,798, tagged as anintj.
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 83199, this pair ranks #14,277 of 530,003 scored English confusable pairs - among the most confusable pairs.
Orthographic DNA of flue vs fut
Shared letters: fu. Private to "flue": el. Private to "fut": t.
"flue" · 4 letters · shape CCVV · "fut" · 3 letters · shape CVC
Known mistypes of this pair
- flue ← fflue · fleu · fllue · lfue
Frequently Asked Questions
Can "flue" and "fut" be used interchangeably?
Which is more common, "flue" or "fut"?
Useful next steps
Done with this confusable. These links stay specific to "flue" and "fut".
- Full dictionary entry for "flue" with definition, IPA, and generated misspellings. Word entry
- Full dictionary entry for "fut" - compare definitions side by side with the headword page. Word entry
- This pair ranks #14,277 of 530,003 scored English confusable pairs in this corpus vintage. Corpus statistics
- "flue" and "fut" also get mixed up with nearby pairs, the highest-scored neighbour is "foh vs fut". 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 #14,277 of 530,003 scored English pairs, corpus vintage 2026-09-03, not spelling advice.