duc vs DUI, What's the Difference?

Which to use

“duc” and “DUI” are a confusable English pair: similar on the page, but distinct in meaning, check the gloss before you choose.

#36,966
“duc” frequency rank: #18,294
“DUI” frequency rank: 55260
confusion score

Side-by-Side Comparison

Feature	duc	DUI
Definition	A French duke.	Initialism of driving under the influence [of alcohol or other drugs]: the act of doing so; a charge or conviction for that act.

Letter map: duc vs DUI

Shared letters muted; letters that set duc and DUI apart highlighted. Shared run: 2.

3 ch

duc

3 ch

DUI

Corpus notes: duc and DUI

duc and DUI 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 a single letter - c in “duc” becomes i in “DUI”. Our composite confusion score for this pair is 55260, derived from the frequency rank of both members and their visual similarity.

duc is recorded at frequency rank #36,966, classified as anoun. DUI is at rank #18,294, tagged as anoun, pronounced /ˌdiː.juːˈaɪ/.

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 55260, this pair ranks #134,962 of 530,003 scored English confusable pairs - among the most confusable pairs.

Orthographic DNA of duc vs DUI

Shared letters: du. Private to "duc": c. Private to "DUI": i.

"duc" · 3 letters · shape CVC · "DUI" · 3 letters · shape CVV

Frequently Asked Questions

Do "duc" and "DUI" mean the same thing in a sentence?

No. They differ by a single letter - c in “duc” becomes i in “DUI”, but the dictionary glosses above give them different meanings, so swapping one for the other changes what the sentence says.

Which is more common, "duc" or "DUI"?

"DUI" is the more common of the two: it sits at frequency rank #18,294 in our English list, against #36,966 for "duc". The two are close in frequency, so neither is a safe default; check the meaning rather than guessing.

After this comparison

Pair "duc" vs "DUI" 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 "DUI" - compare definitions side by side with the headword page. Word entry
This pair ranks #134,962 of 530,003 scored English confusable pairs in this corpus vintage. Corpus statistics
"duc" and "DUI" also get mixed up with nearby pairs, the highest-scored neighbour is "dox vs duc". Nearby pair

Confusion rank #134,962 of 530,003 scored English pairs, corpus vintage 2026-09-03, not spelling advice.