Which to use
“ISBN” is an abbrev and “isto” is a pronoun - they look or sound alike but fill different roles in a sentence.
- #11,899
- “ISBN” frequency rank
- #349
- “isto” frequency rank
- 12248
- confusion score
Side-by-Side Comparison
| Feature | ISBN | isto |
|---|---|---|
| Definition | sigla formada com as iniciais de International Standard Book Number, sequência numérica de dez ou treze dígitos com a finalidade de identificação numérica de um livro segundo seu título, autor, país, ou código de idioma, e a editora, individualizando inclusive edições diferentes de tal forma que cada livro tenha um número próprio e único | indica algo que está próximo a quem fala ou assunto de que se fala |
Letter map: ISBN vs isto
Shared letters muted; letters that set ISBN and isto apart highlighted. Shared run: 2. ISBN (VCCC) and isto (VCCV) run the same length but a different consonant-vowel pattern - the shape difference is usually the fastest tell.
Part-of-speech tell for ISBN / isto
Our dataset has no pronunciation recorded for both members, so the reliable separator here is grammatical: ISBN is anabbrev and istoapronoun. On the page they share most of their letters but differ in 2 positions. Our composite confusion score for this pair is 12248, derived from the frequency rank of both members and their visual similarity.
ISBN is recorded at frequency rank #11,899, classified as anabbrev. isto is at rank #349, tagged as apron, pronounced /ˈis.tu/.
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 12248, this pair ranks #60,410 of 75,631 scored Portuguese confusable pairs - a relatively easy-to-tell-apart pair.
Orthographic DNA of ISBN vs isto
Shared letters: is. Private to "ISBN": bn. Private to "isto": ot.
"ISBN" · 4 letters · shape VCCC · "isto" · 4 letters · shape VCCV
Known mistypes of this pair
Frequently Asked Questions
Is swapping "ISBN" for "isto" ever safe?
Which is more common, "ISBN" or "isto"?
After this comparison
Pair "ISBN" vs "isto" is on the table, pick a follow-up below.
- Full dictionary entry for "ISBN" with definition, IPA, and generated misspellings. Word entry
- Full dictionary entry for "isto" - compare definitions side by side with the headword page. Word entry
- This pair ranks #60,410 of 75,631 scored Portuguese confusable pairs in this corpus vintage. Corpus statistics
- "ISBN" and "isto" also get mixed up with nearby pairs, the highest-scored neighbour is "íon vs ISBN". 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 #60,410 of 75,631 scored Portuguese pairs, corpus vintage 2026-09-03, not spelling advice.