ihnvsISBNWhat's the difference?

Quick tell: ihn is a pronoun, ISBN is a noun, so they fill different roles in a sentence.

Which to use

“ihn” is a pronoun and “ISBN” is a noun - they look or sound alike but fill different roles in a sentence.

#140
“ihn” frequency rank
#6,075
“ISBN” frequency rank
6215
confusion score

Side-by-Side Comparison

Feature ihn ISBN
Definition Personalpronomen 3. Person Maskulinum Singular Akkusativ 10- oder 13-stellige Nummer zur eindeutigen Kennzeichnung von Büchern, die seit 1973 jedes Buch erhält

Where the eye mixes ihn and ISBN

Muted = shared; highlighted = the visual trap. They share 2 letters in sequence.

3 ch
ihn
4 ch
ISBN

Visual trap between ihn and ISBN

These two trip readers on the page rather than in the ear: ihn is [iːn] while ISBN is [iːʔɛsbeːˈʔɛn]. Spoken aloud the problem disappears. In writing it persists, because they differ by 1 letter(s) in length, and the parts of speech differ too (pronoun vs noun), which is usually the fastest check. Our composite confusion score for this pair is 6215, derived from the frequency rank of both members and their visual similarity.

ihn is recorded at frequency rank #140, classified as apron, pronounced [iːn]. ISBN is at rank #6,075, tagged as anoun, pronounced [iːʔɛsbeːˈʔɛn].

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 6215, this pair ranks #1,992,355 of 2,006,359 scored German confusable pairs - a relatively easy-to-tell-apart pair.

Orthographic DNA of ihn vs ISBN

Shared letters: in. Private to "ihn": h. Private to "ISBN": bs.

"ihn" · 3 letters · shape VCC  ·  "ISBN" · 4 letters · shape VCCC

Known mistypes of this pair

  • ISBNibsn · isbbn · isbnn · isnb · issbn · sibn

Frequently Asked Questions

Can "ihn" and "ISBN" be used interchangeably?
No - they are not even the same part of speech. "ihn" is a pronoun and "ISBN" a noun, so a sentence built for one is usually ungrammatical with the other.
Frequency check: "ihn" vs "ISBN" - which ranks higher?
"ihn" is the more common of the two: it sits at frequency rank #140 in our German list, against #6,075 for "ISBN". That is a wide gap, so in ordinary text the rarer spelling is the one worth double-checking.

What to do next

Visual near-miss handled. Browse the word pages or a neighbour when the next look-alike shows up.

  • Full dictionary entry for "ihn" with definition, IPA, and generated misspellings. Word entry
  • Full dictionary entry for "ISBN" - compare definitions side by side with the headword page. Word entry
  • This pair ranks #1,992,355 of 2,006,359 scored German confusable pairs in this corpus vintage. Corpus statistics
  • "ihn" and "ISBN" also get mixed up with nearby pairs, the highest-scored neighbour is "ihn vs IMs". 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 #1,992,355 of 2,006,359 scored German pairs, corpus vintage 2026-09-03, not spelling advice.

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

Source: FrequencyWords open word-frequency list