Which to use
“UD” is an adjective and “used” is a verb - they look or sound alike but fill different roles in a sentence.
- #23,139
- “UD” frequency rank
- #156
- “used” frequency rank
- 23295
- confusion score
Side-by-Side Comparison
| Feature | UD | used |
|---|---|---|
| Definition | Abbreviation of undead. | simple past and past participle of use |
Letter map: UD vs used
Shared letters muted; letters that set UD and used apart highlighted. Shared run: 2.
Grammar separator: UD vs used
Our dataset has no pronunciation recorded for both members, so the reliable separator here is grammatical: UD is anadjective and usedaverb. On the page they differ by 2 letter(s) in length. Our composite confusion score for this pair is 23295, derived from the frequency rank of both members and their visual similarity.
UD is recorded at frequency rank #23,139, classified as anadj. used is at rank #156, tagged as averb, pronounced /juːzd/.
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 23295, this pair ranks #410,380 of 530,003 scored English confusable pairs - a relatively easy-to-tell-apart pair.
Orthographic DNA of UD vs used
Shared letters: du. Private to "UD": -. Private to "used": es.
"UD" · 2 letters · shape VC · "used" · 4 letters · shape VCVC
Known mistypes of this pair
- used ← uesd · usde · usedd · ussed
Frequently Asked Questions
Is swapping "UD" for "used" ever safe?
Which is more common, "UD" or "used"?
After this comparison
Done with this confusable. These links stay specific to "UD" and "used".
- Full dictionary entry for "UD" with definition, IPA, and generated misspellings. Word entry
- Full dictionary entry for "used" - compare definitions side by side with the headword page. Word entry
- This pair ranks #410,380 of 530,003 scored English confusable pairs in this corpus vintage. Corpus statistics
- "UD" and "used" also get mixed up with nearby pairs, the highest-scored neighbour is "UAS vs UD". 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 #410,380 of 530,003 scored English pairs, corpus vintage 2026-09-03, not spelling advice.