Which to use
“dud” is a noun and “dy” is a verb - they look or sound alike but fill different roles in a sentence.
- #29,251
- “dud” frequency rank
- #29,635
- “dy” frequency rank
- 58886
- confusion score
Side-by-Side Comparison
| Feature | dud | dy |
|---|---|---|
| Definition | A device or machine that is useless because it does not work properly or has failed to work, such as a bomb, or explosive projectile. | Obsolete form of die. |
Letter map: dud vs dy
Shared letters muted; letters that set dud and dy apart highlighted. Shared run: 1.
Role in the sentence - dud and dy
Our dataset has no pronunciation recorded for both members, so the reliable separator here is grammatical: dud is anoun and dyaverb. On the page they differ by 1 letter(s) in length. Our composite confusion score for this pair is 58886, derived from the frequency rank of both members and their visual similarity.
dud is recorded at frequency rank #29,251, classified as anoun, pronounced /dʌd/. dy is at rank #29,635, tagged as averb.
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 58886, this pair ranks #109,631 of 530,003 scored English confusable pairs - among the most confusable pairs.
Orthographic DNA of dud vs dy
Shared letters: d. Private to "dud": u. Private to "dy": y.
"dud" · 3 letters · shape CVC · "dy" · 2 letters · shape CV
Frequently Asked Questions
Is swapping "dud" for "dy" ever safe?
In ordinary English text, does "dud" or "dy" show up more?
Useful next steps
Done with this confusable. These links stay specific to "dud" and "dy".
- Full dictionary entry for "dud" with definition, IPA, and generated misspellings. Word entry
- Full dictionary entry for "dy" - compare definitions side by side with the headword page. Word entry
- This pair ranks #109,631 of 530,003 scored English confusable pairs in this corpus vintage. Corpus statistics
- "dud" and "dy" also get mixed up with nearby pairs, the highest-scored neighbour is "dox vs dy". Nearby pair
Confusion rank #109,631 of 530,003 scored English pairs, corpus vintage 2026-09-03, not spelling advice.