MuldervsmullenWhat's the difference?

Quick tell: Mulder is a name, mullen is a noun, so they fill different roles in a sentence.

Which to use

“Mulder” is a name and “mullen” is a noun - they look or sound alike but fill different roles in a sentence.

#27,573
“Mulder” frequency rank
#26,177
“mullen” frequency rank
53750
confusion score

Side-by-Side Comparison

Feature Mulder mullen
Definition A surname from Dutch, equivalent to English Miller. Alternative form of mullein.

Letter map: Mulder vs mullen

Shared letters muted; letters that set Mulder and mullen apart highlighted. Shared run: 4. Mulder and mullen follow the identical consonant-vowel pattern (CVCCVC). Same shape at a glance is often the real trap, independent of shared letters.

6 ch
Mulder
6 ch
mullen

Role in the sentence - Mulder and mullen

Our dataset has no pronunciation recorded for both members, so the reliable separator here is grammatical: Mulder is aname and mullenanoun. On the page they share most of their letters but differ in 2 positions. Our composite confusion score for this pair is 53750, derived from the frequency rank of both members and their visual similarity.

Mulder is recorded at frequency rank #27,573, classified as aname, pronounced /ˈmʌl.də(ɹ)/. mullen is at rank #26,177, tagged as anoun.

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 53750, this pair ranks #146,510 of 530,003 scored English confusable pairs - roughly mid-pack for confusability.

Orthographic DNA of Mulder vs mullen

Shared letters: elmu. Private to "Mulder": dr. Private to "mullen": n.

"Mulder" · 6 letters · shape CVCCVC  ·  "mullen" · 6 letters · shape CVCCVC

Known mistypes of this pair

  • Mulder ← mluder · mmulder · mudler · muldder · mulderr · muldre · muledr · mullder
  • mullen ← mlulen · mmullen · muleln · mulen · mullenn · mullne · umllen

Frequently Asked Questions

Is swapping "Mulder" for "mullen" ever safe?
No - they are not even the same part of speech. "Mulder" is a name and "mullen" a noun, so a sentence built for one is usually ungrammatical with the other.
In ordinary English text, does "Mulder" or "mullen" show up more?
"mullen" is the more common of the two: it sits at frequency rank #26,177 in our English list, against #27,573 for "Mulder". The two are close in frequency, so neither is a safe default; check the meaning rather than guessing.

After this comparison

Pair "Mulder" vs "mullen" is on the table, pick a follow-up below.

  • Full dictionary entry for "Mulder" with definition, IPA, and generated misspellings. Word entry
  • Full dictionary entry for "mullen" - compare definitions side by side with the headword page. Word entry
  • This pair ranks #146,510 of 530,003 scored English confusable pairs in this corpus vintage. Corpus statistics
  • "Mulder" and "mullen" also get mixed up with nearby pairs, the highest-scored neighbour is "McMullen vs mullen". 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 #146,510 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