dum vs dun, What's the Difference?

Which to use

“dum” is an adjective and “dun” is a noun - they look or sound alike but fill different roles in a sentence.

#23,517
“dum” frequency rank: #18,810
“dun” frequency rank: 42327
confusion score

Side-by-Side Comparison

Feature	dum	dun
Definition	cooked with steam	A brownish grey colour.

Where the eye mixes dum and dun

Muted = shared; highlighted = the visual trap. They share 2 letters in sequence.

3 ch

dum

3 ch

dun

Spelling & Dictionary Insight

These two trip readers on the page rather than in the ear: dum is /dʌm/ while dun is /dʌn/. Spoken aloud the problem disappears. In writing it persists, because they differ by a single letter - m in “dum” becomes n in “dun”, and the parts of speech differ too (adjective vs noun), which is usually the fastest check. Our composite confusion score for this pair is 42327, derived from the frequency rank of both members and their visual similarity.

dum is recorded at frequency rank #23,517, classified as anadj, pronounced /dʌm/. dun is at rank #18,810, tagged as anoun, pronounced /dʌn/.

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 42327, this pair ranks #250,246 of 530,003 scored English confusable pairs - roughly mid-pack for confusability.

Orthographic DNA of dum vs dun

Shared letters: du. Private to "dum": m. Private to "dun": n.

"dum" · 3 letters · shape CVC · "dun" · 3 letters · shape CVC

Frequently Asked Questions

Can "dum" and "dun" be used interchangeably?

No - they are not even the same part of speech. "dum" is an adjective and "dun" a noun, so a sentence built for one is usually ungrammatical with the other.

Which is more common, "dum" or "dun"?

"dun" is the more common of the two: it sits at frequency rank #18,810 in our English list, against #23,517 for "dum". The two are close in frequency, so neither is a safe default; check the meaning rather than guessing.

What to do next

You've compared "dum" and "dun". Here's where to go from here.

Full dictionary entry for "dum" with definition, IPA, and generated misspellings. Word entry
Full dictionary entry for "dun" - compare definitions side by side with the headword page. Word entry
This pair ranks #250,246 of 530,003 scored English confusable pairs in this corpus vintage. Corpus statistics
"dum" and "dun" also get mixed up with nearby pairs, the highest-scored neighbour is "dox vs dum". Nearby pair

PlainSpell is a reference corpus, not spelling advice. Verify unusual forms in context.