Which to use
“is” is a verb and “ISBN” is an abbrev - they look or sound alike but fill different roles in a sentence.
- #1,709
- “is” frequency rank
- #11,899
- “ISBN” frequency rank
- 13608
- confusion score
Side-by-Side Comparison
| Feature | is | ISBN |
|---|---|---|
| Definition | contração de agus; e | 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 |
Where the spellings diverge
Shared letters are muted; the letters that actually set is and ISBN apart are highlighted. They share 2 letters in sequence, which is exactly why the eye skips the difference.
Spelling & Dictionary Insight
is and ISBN form a confusable pair in the Portuguese index, two distinct headwords that are easily confused because they look alike, sound alike, or both. They differ by 2 extra letter(s) - “is” sits inside “ISBN” - close enough that the eye skips over the difference, far enough that meaning fully diverges. Our composite confusion score for this pair is 13608, derived from the frequency rank of both members and their visual similarity.
is is recorded at frequency rank #1,709, classified as averb. ISBN is at rank #11,899, tagged as anabbrev.
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 13608, this pair ranks #58,680 of 75,631 scored Portuguese confusable pairs - a relatively easy-to-tell-apart pair.
Frequency comparison
Frequently Asked Questions
Can "is" and "ISBN" be used interchangeably?
Remembering is vs ISBN
The fastest way to pick the right one every time.
- Check the role first: if you need a verb, it's “is”; for an abbrev, it's “ISBN”.
- See each word in full, definition, IPA, etymology and its other confusables. Full “is” entry
- Browse more pairs most likely to be confused. Most confusable