brainvsbrunWhat's the difference?

Quick tell: brain is a noun, brun is an adjective, so they fill different roles in a sentence.

Which to use

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

#17,241
“brain” frequency rank
#48,026
“brun” frequency rank
65267
confusion score

Side-by-Side Comparison

Feature brain brun
Definition das Gehirn, zentraler Teil des menschlichen Nervensystems braun

Letter map: brain vs brun

Shared letters muted; letters that set brain and brun apart highlighted. Shared run: 3.

5 ch
brain
4 ch
brun

Part-of-speech tell for brain / brun

Our dataset has no pronunciation recorded for both members, so the reliable separator here is grammatical: brain is anoun and brunanadjective. On the page they differ by 1 letter(s) in length. Our composite confusion score for this pair is 65267, derived from the frequency rank of both members and their visual similarity.

brain is recorded at frequency rank #17,241, classified as anoun, pronounced [bɹeɪn]. brun is at rank #48,026, tagged as anadj, pronounced […].

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 65267, this pair ranks #612,794 of 2,006,359 scored German confusable pairs - roughly mid-pack for confusability.

Orthographic DNA of brain vs brun

Shared letters: bnr. Private to "brain": ai. Private to "brun": u.

"brain" · 5 letters · shape CCVVC  ·  "brun" · 4 letters · shape CCVC

Known mistypes of this pair

  • brainbarin · bbrain · brainn · brani · brrain · rbain
  • brunbbrun · brnu · brrun · brunn · rbun

Frequently Asked Questions

Do "brain" and "brun" mean the same thing in a sentence?
No - they are not even the same part of speech. "brain" is a noun and "brun" an adjective, so a sentence built for one is usually ungrammatical with the other.
Which is more common, "brain" or "brun"?
"brain" is the more common of the two: it sits at frequency rank #17,241 in our German list, against #48,026 for "brun". The two are close in frequency, so neither is a safe default; check the meaning rather than guessing.

After this comparison

Done with this confusable. These links stay specific to "brain" and "brun".

  • Full dictionary entry for "brain" with definition, IPA, and generated misspellings. Word entry
  • Full dictionary entry for "brun" - compare definitions side by side with the headword page. Word entry
  • This pair ranks #612,794 of 2,006,359 scored German confusable pairs in this corpus vintage. Corpus statistics
  • "brain" and "brun" also get mixed up with nearby pairs, the highest-scored neighbour is "brun vs puzzles". 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 #612,794 of 2,006,359 scored German pairs, corpus vintage 2026-09-03, not spelling advice.

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

Source: FrequencyWords open word-frequency list