Which to use
“duff” and “dupe” are a confusable English pair: similar on the page, but distinct in meaning, check the gloss before you choose.
- #18,063
- “duff” frequency rank
- #37,898
- “dupe” frequency rank
- 55961
- confusion score
Side-by-Side Comparison
| Feature | duff | dupe |
|---|---|---|
| Definition | Dough. | A person who has been deceived. |
Where the eye mixes duff and dupe
Muted = shared; highlighted = the visual trap. They share 2 letters in sequence. duff (CVCC) and dupe (CVCV) run the same length but a different consonant-vowel pattern - the shape difference is usually the fastest tell.
Visual trap between duff and dupe
A purely visual mix-up. duff (/dʌf/) and dupe (/dʒuːp/) are said differently, so reading them aloud is the quickest way to catch the wrong one. On the page they stay close: they share most of their letters but differ in 2 positions. Our composite confusion score for this pair is 55961, derived from the frequency rank of both members and their visual similarity.
duff is recorded at frequency rank #18,063, classified as anoun, pronounced /dʌf/. dupe is at rank #37,898, tagged as anoun, pronounced /dʒuːp/.
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 55961, this pair ranks #129,690 of 530,003 scored English confusable pairs - among the most confusable pairs.
Orthographic DNA of duff vs dupe
Shared letters: du. Private to "duff": f. Private to "dupe": ep.
"duff" · 4 letters · shape CVCC · "dupe" · 4 letters · shape CVCV
Known mistypes of this pair
Frequently Asked Questions
Can "duff" and "dupe" be used interchangeably?
Which is more common, "duff" or "dupe"?
Useful next steps
Eye-level mix-up between "duff" and "dupe" is sorted above. Next: full entries or other pairs that share a letter shape.
- Full dictionary entry for "duff" with definition, IPA, and generated misspellings. Word entry
- Full dictionary entry for "dupe" - compare definitions side by side with the headword page. Word entry
- This pair ranks #129,690 of 530,003 scored English confusable pairs in this corpus vintage. Corpus statistics
- "duff" and "dupe" also get mixed up with nearby pairs, the highest-scored neighbour is "Druze vs dupe". 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 #129,690 of 530,003 scored English pairs, corpus vintage 2026-09-03, not spelling advice.