boavsbookTell them apart

Which to use

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

#165
“boa” frequency rank
#5,603
“book” frequency rank
5768
confusion score

Side-by-Side Comparison

Feature boa book
Definition jiboia livro

Letter map: boa vs book

Shared letters muted; letters that set boa and book apart highlighted. Shared run: 2.

3 ch
boa
4 ch
book

Corpus notes: boa and book

boa and book 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 differ by 1 letter(s) in length. Our composite confusion score for this pair is 5768, derived from the frequency rank of both members and their visual similarity.

boa is recorded at frequency rank #165, classified as anoun, pronounced /ˈbo.ɐ/. book is at rank #5,603, 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 5768, this pair ranks #68,787 of 75,631 scored Portuguese confusable pairs - a relatively easy-to-tell-apart pair.

Orthographic DNA of boa vs book

Shared letters: bo. Private to "boa": a. Private to "book": k.

"boa" · 3 letters · shape CVV  ·  "book" · 4 letters · shape CVVC

Known mistypes of this pair

  • bookbbook · boko · bookk · obok

Frequently Asked Questions

Can "boa" and "book" be used interchangeably?
No. They differ by 1 letter(s) in length, but the dictionary glosses above give them different meanings, so swapping one for the other changes what the sentence says.
Frequency check: "boa" vs "book" - which ranks higher?
"boa" is the more common of the two: it sits at frequency rank #165 in our Portuguese list, against #5,603 for "book". That is a wide gap, so in ordinary text the rarer spelling is the one worth double-checking.

After this comparison

You've compared "boa" and "book". Here's where to go from here.

  • Full dictionary entry for "boa" with definition, IPA, and generated misspellings. Word entry
  • Full dictionary entry for "book" - compare definitions side by side with the headword page. Word entry
  • This pair ranks #68,787 of 75,631 scored Portuguese confusable pairs in this corpus vintage. Corpus statistics
  • "boa" and "book" also get mixed up with nearby pairs, the highest-scored neighbour is "bolor vs book". Nearby pair
  • Recorded mistypes exist for at least one side of this pair, useful when a spell-checker or OCR lands on the wrong form. See mistypes

Confusion rank #68,787 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