bvsbumWhat's the difference?

Quick tell: b is a character, bum is a noun, so they fill different roles in a sentence.

Which to use

“b” is a character and “bum” is a noun - they look or sound alike but fill different roles in a sentence.

#602
“b” frequency rank
#34,919
“bum” frequency rank
35521
confusion score

Side-by-Side Comparison

Feature b bum
Definition Segunda letra del abecedario español y primera consonante. Su nombre es be, be alta o be larga. Indica o imita el ruido de un golpe o de una explosión.

Where the eye mixes b and bum

Muted = shared; highlighted = the visual trap. They share 1 letter in sequence.

1 ch
b
3 ch
bum

Why the eye confuses b with bum

These two trip readers on the page rather than in the ear: b is [ˈbe] while bum is [ˈbũm]. Spoken aloud the problem disappears. In writing it persists, because they differ by 2 extra letter(s) - “b” sits inside “bum”, and the parts of speech differ too (character vs noun), which is usually the fastest check. Our composite confusion score for this pair is 35521, derived from the frequency rank of both members and their visual similarity.

b is recorded at frequency rank #602, classified as acharacter, pronounced [ˈbe]. bum is at rank #34,919, tagged as anoun, pronounced [ˈbũm].

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 35521, this pair ranks #185,633 of 323,831 scored Spanish confusable pairs - roughly mid-pack for confusability.

Orthographic DNA of b vs bum

Shared letters: b. Private to "b": -. Private to "bum": mu.

"b" · 1 letters · shape C  ·  "bum" · 3 letters · shape CVC

Frequently Asked Questions

Is swapping "b" for "bum" ever safe?
No - they are not even the same part of speech. "b" is a character and "bum" a noun, so a sentence built for one is usually ungrammatical with the other.
Frequency check: "b" vs "bum" - which ranks higher?
"b" is the more common of the two: it sits at frequency rank #602 in our Spanish list, against #34,919 for "bum". That is a wide gap, so in ordinary text the rarer spelling is the one worth double-checking.

What to do next

Visual near-miss handled. Browse the word pages or a neighbour when the next look-alike shows up.

  • Full dictionary entry for "b" with definition, IPA, and generated misspellings. Word entry
  • Full dictionary entry for "bum" - compare definitions side by side with the headword page. Word entry
  • This pair ranks #185,633 of 323,831 scored Spanish confusable pairs in this corpus vintage. Corpus statistics
  • "b" and "bum" also get mixed up with nearby pairs, the highest-scored neighbour is "bum vs butt". Nearby pair

Confusion rank #185,633 of 323,831 scored Spanish pairs, corpus vintage 2026-09-03, not spelling advice.

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

Source: FrequencyWords open word-frequency list