bisvsbosTell them apart

Quick tell: bis is a preposition, bos is a noun, so they fill different roles in a sentence.

Which to use

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

#14,300
“bis” frequency rank
#41,858
“bos” frequency rank
56158
confusion score

Side-by-Side Comparison

Feature bis bos
Definition até floresta, bosque

Letter map: bis vs bos

Shared letters muted; letters that set bis and bos apart highlighted. Shared run: 2.

3 ch
bis
3 ch
bos

Part-of-speech tell for bis / bos

Our dataset has no pronunciation recorded for both members, so the reliable separator here is grammatical: bis is apreposition and bosanoun. On the page they differ by a single letter - i in “bis” becomes o in “bos”. Our composite confusion score for this pair is 56158, derived from the frequency rank of both members and their visual similarity.

bis is recorded at frequency rank #14,300, classified as aprep. bos is at rank #41,858, tagged as anoun, pronounced /bɔs/.

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 56158, this pair ranks #10,134 of 75,631 scored Portuguese confusable pairs - among the most confusable pairs.

Orthographic DNA of bis vs bos

Shared letters: bs. Private to "bis": i. Private to "bos": o.

"bis" · 3 letters · shape CVC  ·  "bos" · 3 letters · shape CVC

Frequently Asked Questions

Do "bis" and "bos" mean the same thing in a sentence?
No - they are not even the same part of speech. "bis" is a preposition and "bos" a noun, so a sentence built for one is usually ungrammatical with the other.
In ordinary Portuguese text, does "bis" or "bos" show up more?
"bis" is the more common of the two: it sits at frequency rank #14,300 in our Portuguese list, against #41,858 for "bos". The two are close in frequency, so neither is a safe default; check the meaning rather than guessing.

After this comparison

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

  • Full dictionary entry for "bis" with definition, IPA, and generated misspellings. Word entry
  • Full dictionary entry for "bos" - compare definitions side by side with the headword page. Word entry
  • This pair ranks #10,134 of 75,631 scored Portuguese confusable pairs in this corpus vintage. Corpus statistics
  • "bis" and "bos" also get mixed up with nearby pairs, the highest-scored neighbour is "bos vs bué". Nearby pair

Confusion rank #10,134 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