bakvsbumWhat's the difference?

Which to use

“bak” and “bum” are a confusable Portuguese pair: similar on the page, but distinct in meaning, check the gloss before you choose.

#38,589
“bak” frequency rank
#16,457
“bum” frequency rank
55046
confusion score

Side-by-Side Comparison

Feature bak bum
Definition retaguarda, parte traseira crescimento

Letter map: bak vs bum

Shared letters muted; letters that set bak and bum apart highlighted. Shared run: 1.

3 ch
bak
3 ch
bum

Pair insight - bak / bum

bak and bum are indexed as a confusable Portuguese pair. We have no recorded pronunciation or part of speech for both members, so the spelling overlap is what we can show you: they share most of their letters but differ in 2 positions. Our composite confusion score for this pair is 55046, derived from the frequency rank of both members and their visual similarity.

bak is recorded at frequency rank #38,589, classified as anoun, pronounced /ˈbaːk/. bum is at rank #16,457, 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 55046, this pair ranks #10,848 of 75,631 scored Portuguese confusable pairs - among the most confusable pairs.

Orthographic DNA of bak vs bum

Shared letters: b. Private to "bak": ak. Private to "bum": mu.

"bak" · 3 letters · shape CVC  ·  "bum" · 3 letters · shape CVC

Frequently Asked Questions

Can "bak" and "bum" be used interchangeably?
No. They share most of their letters but differ in 2 positions, but the dictionary glosses above give them different meanings, so swapping one for the other changes what the sentence says.
In ordinary Portuguese text, does "bak" or "bum" show up more?
"bum" is the more common of the two: it sits at frequency rank #16,457 in our Portuguese list, against #38,589 for "bak". The two are close in frequency, so neither is a safe default; check the meaning rather than guessing.

Useful next steps

Done with this confusable. These links stay specific to "bak" and "bum".

  • Full dictionary entry for "bak" 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 #10,848 of 75,631 scored Portuguese confusable pairs in this corpus vintage. Corpus statistics
  • "bak" and "bum" also get mixed up with nearby pairs, the highest-scored neighbour is "bak vs bué". Nearby pair

Confusion rank #10,848 of 75,631 scored Portuguese pairs, corpus vintage 2026-09-03, not spelling advice.

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

Source: FrequencyWords open word-frequency list