ISBN

abbrev

The verdict

“ISBN” has 6 generated spelling variants in the Portuguese index at frequency #11,899. The variants make it a useful spelling check.

#11,899
frequency rank, Portuguese
938
“I” headwords
6
tracked misspellings
7
confusable pairs

According to Wiktionary data (CC BY-SA, analyzed September 3, 2026) - 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, paí...

Corpus desk

Index PT-isbn · ISBN · Portuguese

ISBN · rank #11,899 · 6 variants · 7 confusables

  • FREQ-MID #11,899
  • LEN-MID 4 letters
  • VOW-1 1 vowel
  • CONFUS-MID 7 pairs
  • VAR-MID 6 variants
  • BOOK-MID 938
  • PHOTO-FINISH ka

Nearest frequency peer: ka (+2 rank slots)

Desk codes from Wiktionary headword shape, FrequencyWords rank tier, confusable-pair count, generated misspelling depth, letter-cohort book size, and photo-finish peer. Not a difficulty grade.

Pares de rank junto ao íman ortográfico “ISBN”

Mesma faixa de raridade: útil se um typo cair num lema vizinho

corpus weight

What this shows “ISBN” está entre estes pares FrequencyWords; a profundidade de typo mede-se à parte no gráfico de distância de edição.

Source FrequencyWords open word-frequency list As of September 3, 2026

Visual similarity to commonly confused words

How many letter changes separate each confused pair (Levenshtein distance, normalized).

ISBN vs isso
0% similar
ISBN vs isto
0% similar
ISBN vs in
0% similar

Source: PlainSpell confusable corpus (Wiktionary, CC BY-SA).

Key facts for ISBN
PropertyValue
HeadwordISBN
LanguagePortuguese
Part of speechAbbreviation
Letters4
Frequency rank#11,899
Misspellings tracked6
Confusable pairs7
SourceWiktionary (kaikki.org)

Frequência do íman ortográfico “ISBN”

Esta escala corre do núcleo do português quotidiano (esquerda) até o rastro de formas raras (direita).ISBNcai aqui:

#1#100#1K#10K#100K
← used constantlyrarely used →

A escala é logarítmica (cada marca ≈ 10× mais rara). Na mesma faixa de raridade aparecem “ka” (#11,901), “kiss” (#11,902), “imperatriz” (#11,893). Entre 938 lemas com “I”, “ISBN” fica em #11,899. Source: FrequencyWords open word-frequency list.

A misspelling magnet

The generator records 6 spelling variants around ISBN, anabbreviation. Corpus frequency is #11,899 among 938 “I” headwords. Dominant gloss: "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, paí...".

Our generated misspelling index lists 6 likely wrong-spelling variants for ISBN, with forms such as "ibsn", "isbbn", and "isbnn". Every one of these variants traces to a single-character edit -- an added or dropped letter, a swapped consonant, or a vowel swap -- the kind of slip a spell-checker is built to catch. It also participates in 7 confusable-pair relationships, "isso", "isto", "in", and more, where similar look or sound leads writers to substitute one word for another in context.

No documented word history exists for this headword, so its spelling is easiest to reason about phoneme by phoneme, absent a documented history. The correct Portuguese form is ISBN, spelled I-S-B-N.

Definition

  1. 1
    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

Recorded use

Wiktionary examples

These source excerpts show how ISBN appears in context. They illustrate usage; the definition above remains the entry’s reference meaning.

  1. Nota¹: o sistema foi originalmente criado no Reino Unido em 1966 por uma editora, com nove dígitos, e já no ano seguinte o sistema ISO lançou uma numeração de dez dígitos, tornando
  2. Nota²: o sistema facilita a organização nas bibliotecas, livrarias e, com a introdução de um código de barras, também sua comercialização, permitindo que se aplique o preço ao volume específico

Common misspellings

Also misspelled as:

  • ibsn
  • isbbn
  • isbnn
  • isnb
  • issbn
  • sibn

Misspelling Pattern Breakdown

How far each generated variant is from the correct spelling of ISBN - measured in single-character edits (insert, delete, or substitute a letter). Larger bars are easier to catch; one-edit slips are the sneakiest.

ibsn2isbbn1isbnn1isnb2issbn1sibn2
Edit distance from "ISBN"

Definitions, pronunciation, and etymology for this entry are drawn from Wiktionary via the kaikki.org structured extract (CC BY-SA); frequency ordering uses the FrequencyWords open word-frequency list (2018 Portuguese corpus, MIT). See the methodology for how each field is sourced and updated.

Frequently Asked Questions

How do you spell "ISBN"?
"ISBN" is spelled I-S-B-N.
What does "ISBN" mean?
As an abbreviation, "ISBN" means: 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, paí...
What words are commonly confused with "ISBN"?
"ISBN" is commonly confused with "isso", "isto", "in". These words look or sound similar but have different meanings. PlainSpell provides detailed comparisons for each pair.
What language does "ISBN" come from?
"ISBN" is a Portuguese word. You can look up definitions, pronunciations, and spelling data for this and other words across English, Spanish, Portuguese, French, and German on PlainSpell.
Is PlainSpell free to use?
Yes, PlainSpell is a completely free word reference. You can look up definitions, pronunciations, confusable pairs, homophones, and spelling corrections across 5 languages without any sign-up or subscription.

Similar Portuguese words by spelling shape

Same letter count and similar misspelling depth for "ISBN", not the corpus desk frequency band.

Same letter count

Frequency-ranked Portuguese headwords with 4 letters (nearest by frequency rank).

Similar misspelling depth

Headwords with a similar count of attested misspellings (6 here; floor ≥5).

Source: Wiktionary (via kaikki.org) Structured Wiktionary extract

Source: FrequencyWords open word-frequency list