Which to use
“bom” is an adjective and “bum” is a noun - they look or sound alike but fill different roles in a sentence.
- #96
- “bom” frequency rank
- #16,457
- “bum” frequency rank
- 16553
- confusion score
Side-by-Side Comparison
| Feature | bom | bum |
|---|---|---|
| Definition | que corresponde plenamente ao que é exigido, desejado ou esperado quanto à sua natureza, adequação, função, eficácia, funcionamento etc. (falando de ser ou coisa) | crescimento |
Letter map: bom vs bum
Shared letters muted; letters that set bom and bum apart highlighted. Shared run: 2.
Grammar separator: bom vs bum
Our dataset has no pronunciation recorded for both members, so the reliable separator here is grammatical: bom is anadjective and bumanoun. On the page they differ by a single letter - o in “bom” becomes u in “bum”. Our composite confusion score for this pair is 16553, derived from the frequency rank of both members and their visual similarity.
bom is recorded at frequency rank #96, classified as anadj. 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 16553, this pair ranks #54,944 of 75,631 scored Portuguese confusable pairs - roughly mid-pack for confusability.
Orthographic DNA of bom vs bum
Shared letters: bm. Private to "bom": o. Private to "bum": u.
"bom" · 3 letters · shape CVC · "bum" · 3 letters · shape CVC
Frequently Asked Questions
Do "bom" and "bum" mean the same thing in a sentence?
In ordinary Portuguese text, does "bom" or "bum" show up more?
After this comparison
Pair "bom" vs "bum" is on the table, pick a follow-up below.
- Full dictionary entry for "bom" 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 #54,944 of 75,631 scored Portuguese confusable pairs in this corpus vintage. Corpus statistics
- "bom" and "bum" also get mixed up with nearby pairs, the highest-scored neighbour is "bué vs bum". Nearby pair
Confusion rank #54,944 of 75,631 scored Portuguese pairs, corpus vintage 2026-09-03, not spelling advice.