ISDN
[ˌiːʔɛsdeːˈʔɛn]
The verdict
“ISDN” sits in 20 confusable pairs (corpus #31,114) as an abbreviation. The look-alike neighbours are the real trap.
- #31,114
- frequency rank, German
- 17,725
- “I” headwords
- 4
- tracked misspellings
- 20
- confusable pairs
According to Wiktionary data (CC BY-SA, analyzed May 6, 2026) - Internationaler Standard für digitale Telekommunikationsnetze
Visual similarity to commonly confused words
How many letter changes separate each confused pair (Levenshtein distance, normalized).
Source: PlainSpell confusable corpus (Wiktionary, CC BY-SA).
| Property | Value |
|---|---|
| Headword | ISDN |
| Language | German |
| Part of speech | Abbreviation |
| IPA | [ˌiːʔɛsdeːˈʔɛn] |
| Letters | 4 |
| Frequency rank | #31,114 |
| Misspellings tracked | 4 |
| Confusable pairs | 20 |
| Source | Wiktionary (kaikki.org) |
Where “ISDN” sits in German frequency
Easy to mix with look-alikes
The spelling risk for ISDN is neighbouring look-alikes ("ist", "iss", …), not just typos; it is anabbreviation pronounced [ˌiːʔɛsdeːˈʔɛn]. Frequency #31,114 among 17,725 “I” headwords. Gloss: "Internationaler Standard für digitale Telekommunikationsnetze".
Our generated misspelling index lists 4 likely wrong-spelling variants for ISDN, with forms such as "idsn", "isddn", and "isdnn". Each variant is a distinct typo pattern an edit-distance generator flags, typically a doubled-consonant error, a silent-letter drop, or a vowel substitution. It also participates in 20 confusable-pair relationships, "ist", "iss", "ISO", and more, a pairing that trips writers up because the two words share enough sound or shape to blur together.
No borrowing history is documented for this entry, so its spelling is easiest explained by how it's pronounced rather than where it came from. The correct German form is ISDN, spelled I-S-D-N.
Definition
- 1Internationaler Standard für digitale Telekommunikationsnetze
Synonyms
This word in other languages
Common misspellings
Also misspelled as: idsn,isddn,isdnn,issdn
Misspelling Pattern Breakdown
How far each generated variant is from the correct spelling of ISDN - expressed in single-character edits (insert, delete, or swap one letter). Bigger bars stand out at a glance; a one-edit slip is the hardest to catch.
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 German corpus, MIT). See the methodology for how each field is sourced and updated.
Frequently Asked Questions
How do you spell "ISDN"?
What does "ISDN" mean?
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Using “ISDN”
The practical upshot for anyone who landed here from a spell-check.
- The one correct German spelling is I-S-D-N - every other letter order is a misspelling in standard orthography.
- Say it as [ˌiːʔɛsdeːˈʔɛn] (IPA); tap the speaker on the pronunciation badge to hear it where audio exists.
- Don't mix it up with “ist” - see the side-by-side comparison. ISDN vs ist
- Browse more German words and confusable pairs in the same reference. German words
Words at a similar German frequency
Data Source
Wiktionary (via kaikki.org), licensed under CC BY-SA & GFDL. Word ordering uses an open word-frequency list; misspelling variants are generated by edit-distance from the correct headword.