muirvsmullWhat's the difference?

Quick tell: muir is a noun, mull is a verb, so they fill different roles in a sentence.

Which to use

“muir” is a noun and “mull” is a verb - they look or sound alike but fill different roles in a sentence.

#19,395
“muir” frequency rank
#31,263
“mull” frequency rank
50658
confusion score

Side-by-Side Comparison

Feature muir mull
Definition A moor. To work (over) mentally; to cogitate; to ruminate.

Letter map: muir vs mull

Shared letters muted; letters that set muir and mull apart highlighted. Shared run: 2. muir (CVVC) and mull (CVCC) run the same length but a different consonant-vowel pattern - the shape difference is usually the fastest tell.

4 ch
muir
4 ch
mull

Grammar separator: muir vs mull

Our dataset has no pronunciation recorded for both members, so the reliable separator here is grammatical: muir is anoun and mullaverb. On the page they share most of their letters but differ in 2 positions. Our composite confusion score for this pair is 50658, derived from the frequency rank of both members and their visual similarity.

muir is recorded at frequency rank #19,395, classified as anoun. mull is at rank #31,263, tagged as averb, pronounced /mʌl/.

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 50658, this pair ranks #172,278 of 530,003 scored English confusable pairs - roughly mid-pack for confusability.

Orthographic DNA of muir vs mull

Shared letters: mu. Private to "muir": ir. Private to "mull": l.

"muir" · 4 letters · shape CVVC  ·  "mull" · 4 letters · shape CVCC

Known mistypes of this pair

  • muir ← miur · mmuir · muirr · muri · umir
  • mull ← mlul · mmull · mul · umll

Frequently Asked Questions

Is swapping "muir" for "mull" ever safe?
No - they are not even the same part of speech. "muir" is a noun and "mull" a verb, so a sentence built for one is usually ungrammatical with the other.
Which is more common, "muir" or "mull"?
"muir" is the more common of the two: it sits at frequency rank #19,395 in our English list, against #31,263 for "mull". The two are close in frequency, so neither is a safe default; check the meaning rather than guessing.

Useful next steps

Pair "muir" vs "mull" is on the table, pick a follow-up below.

  • Full dictionary entry for "muir" with definition, IPA, and generated misspellings. Word entry
  • Full dictionary entry for "mull" - compare definitions side by side with the headword page. Word entry
  • This pair ranks #172,278 of 530,003 scored English confusable pairs in this corpus vintage. Corpus statistics
  • "muir" and "mull" also get mixed up with nearby pairs, the highest-scored neighbour is "mela vs mull". 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 #172,278 of 530,003 scored English pairs, corpus vintage 2026-09-03, not spelling advice.

Source: Wiktionary (via kaikki.org) Structured Wiktionary extract

Source: FrequencyWords open word-frequency list