bomvsboxWhich spelling fits?

Quick tell: bom is a adjective, box is a noun, so they fill different roles in a sentence.

Which to use

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

#96
“bom” frequency rank
#6,381
“box” frequency rank
6477
confusion score

Side-by-Side Comparison

Feature bom box
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) cada espaço subdividido por parede ou extrutura similar e que é destinado ao uso comercial dentro de uma construção maior

Letter map: bom vs box

Shared letters muted; letters that set bom and box apart highlighted. Shared run: 2.

3 ch
bom
3 ch
box

Part-of-speech tell for bom / box

Our dataset has no pronunciation recorded for both members, so the reliable separator here is grammatical: bom is anadjective and boxanoun. On the page they differ by a single letter - m in “bom” becomes x in “box”. Our composite confusion score for this pair is 6477, derived from the frequency rank of both members and their visual similarity.

bom is recorded at frequency rank #96, classified as anadj. box is at rank #6,381, 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 6477, this pair ranks #67,952 of 75,631 scored Portuguese confusable pairs - a relatively easy-to-tell-apart pair.

Orthographic DNA of bom vs box

Shared letters: bo. Private to "bom": m. Private to "box": x.

"bom" · 3 letters · shape CVC  ·  "box" · 3 letters · shape CVC

Frequently Asked Questions

Is swapping "bom" for "box" ever safe?
No - they are not even the same part of speech. "bom" is an adjective and "box" a noun, so a sentence built for one is usually ungrammatical with the other.
In ordinary Portuguese text, does "bom" or "box" show up more?
"bom" is the more common of the two: it sits at frequency rank #96 in our Portuguese list, against #6,381 for "box". That is a wide gap, so in ordinary text the rarer spelling is the one worth double-checking.

Useful next steps

You've compared "bom" and "box". Here's where to go from here.

  • Full dictionary entry for "bom" with definition, IPA, and generated misspellings. Word entry
  • Full dictionary entry for "box" - compare definitions side by side with the headword page. Word entry
  • This pair ranks #67,952 of 75,631 scored Portuguese confusable pairs in this corpus vintage. Corpus statistics
  • "bom" and "box" also get mixed up with nearby pairs, the highest-scored neighbour is "box vs bué". Nearby pair

Confusion rank #67,952 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