bis vs bum, What's the Difference?

Which to use

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

#14,300
“bis” frequency rank: #16,457
“bum” frequency rank: 30757
confusion score

Side-by-Side Comparison

Feature	bis	bum
Definition	até	crescimento

Letter map: bis vs bum

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

3 ch

bis

3 ch

bum

Grammar separator: bis vs bum

Our dataset has no pronunciation recorded for both members, so the reliable separator here is grammatical: bis is apreposition and bumanoun. On the page they share most of their letters but differ in 2 positions. Our composite confusion score for this pair is 30757, derived from the frequency rank of both members and their visual similarity.

bis is recorded at frequency rank #14,300, classified as aprep. 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 30757, this pair ranks #37,510 of 75,631 scored Portuguese confusable pairs - roughly mid-pack for confusability.

Orthographic DNA of bis vs bum

Shared letters: b. Private to "bis": is. Private to "bum": mu.

"bis" · 3 letters · shape CVC · "bum" · 3 letters · shape CVC

Frequently Asked Questions

Do "bis" and "bum" mean the same thing in a sentence?

No - they are not even the same part of speech. "bis" is a preposition and "bum" a noun, so a sentence built for one is usually ungrammatical with the other.

In ordinary Portuguese text, does "bis" or "bum" show up more?

"bis" is the more common of the two: it sits at frequency rank #14,300 in our Portuguese list, against #16,457 for "bum". The two are close in frequency, so neither is a safe default; check the meaning rather than guessing.

Useful next steps

You've compared "bis" and "bum". Here's where to go from here.

Full dictionary entry for "bis" 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 #37,510 of 75,631 scored Portuguese confusable pairs in this corpus vintage. Corpus statistics
"bis" and "bum" also get mixed up with nearby pairs, the highest-scored neighbour is "bué vs bum". Nearby pair

Confusion rank #37,510 of 75,631 scored Portuguese pairs, corpus vintage 2026-09-03, not spelling advice.