Which to use
“duc” and “duff” are a confusable English pair: similar on the page, but distinct in meaning, check the gloss before you choose.
- #36,966
- “duc” frequency rank
- #18,063
- “duff” frequency rank
- 55029
- confusion score
Side-by-Side Comparison
| Feature | duc | duff |
|---|---|---|
| Definition | A French duke. | Dough. |
Letter map: duc vs duff
Shared letters muted; letters that set duc and duff apart highlighted. Shared run: 2.
Spelling & dictionary notes on duc vs duff
duc and duff are indexed as a confusable English pair. We have no recorded pronunciation or part of speech for both members, so the spelling overlap is what we can show you: they differ by 1 letter(s) in length. Our composite confusion score for this pair is 55029, derived from the frequency rank of both members and their visual similarity.
duc is recorded at frequency rank #36,966, classified as anoun. duff is at rank #18,063, tagged as anoun, pronounced /dʌf/.
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 55029, this pair ranks #136,677 of 530,003 scored English confusable pairs - roughly mid-pack for confusability.
Orthographic DNA of duc vs duff
Shared letters: du. Private to "duc": c. Private to "duff": f.
"duc" · 3 letters · shape CVC · "duff" · 4 letters · shape CVCC
Known mistypes of this pair
- duff ← dduff · dfuf · duf · udff
Frequently Asked Questions
Can "duc" and "duff" be used interchangeably?
In ordinary English text, does "duc" or "duff" show up more?
What to do next
Pair "duc" vs "duff" is on the table, pick a follow-up below.
- Full dictionary entry for "duc" with definition, IPA, and generated misspellings. Word entry
- Full dictionary entry for "duff" - compare definitions side by side with the headword page. Word entry
- This pair ranks #136,677 of 530,003 scored English confusable pairs in this corpus vintage. Corpus statistics
- "duc" and "duff" also get mixed up with nearby pairs, the highest-scored neighbour is "dox vs duc". 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 #136,677 of 530,003 scored English pairs, corpus vintage 2026-09-03, not spelling advice.