ISDN

[ˌiːʔɛsdeːˈʔɛn]

/[ˌiːʔɛsdeːˈʔɛn]/ abbrev

By · According to Wiktionary data (CC BY-SA) ·

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
1,488
“I” headwords
4
tracked misspellings
20
confusable pairs

According to Wiktionary data (CC BY-SA, analyzed September 3, 2026) - Internationaler Standard für digitale Telekommunikationsnetze

Corpus desk

Index DE-isdn · ISDN · German

ISDN · rank #31,114 · 4 variants · 20 confusables

  • FREQ-MID #31,114
  • LEN-MID 4 letters
  • VOW-1 1 vowel
  • CONFUS-HIGH 20 pairs
  • VAR-LOW 4 variants
  • BOOK-MID 1,488
  • PHOTO-FINISH irgendwohin

Nearest frequency peer: irgendwohin (-1 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.

Häufigkeitsnachbarn des Verwechslers „ISDN“

Peers mit ähnlichem Corpus-Gewicht, getrennt von den Verwechslungspaaren unten

corpus weight

What this shows Balken platzieren „ISDN“ gegen die nächsten gerankten deutschen Lemmata, kein Reprint der Verwechslungsdesk.

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).

ISDN vs ist
0% similar
ISDN vs iss
0% similar
ISDN vs ISO
50% similar

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

Key facts for ISDN
PropertyValue
HeadwordISDN
LanguageGerman
Part of speechAbbreviation
IPA[ˌiːʔɛsdeːˈʔɛn]
Letters4
Frequency rank#31,114
Misspellings tracked4
Confusable pairs20
SourceWiktionary (kaikki.org)

Corpus-Rang neben Verwechslern von „ISDN“

Diese Skala geht vom Kern des Alltagdeutschen (links) bis zum seltenen Langschwanz (rechts).ISDNliegt auf dieser Marke:

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

Die Skala ist logarithmisch (jeder Tick ≈ 10× seltener). Peers derselben Seltenheitsbandbreite: „irgendwohin“ (#31,113), „Italienern“ (#31,115), „Iowa“ (#31,112). Unter 1,488 „I“-Lemmata liegt „ISDN“ bei #31,114. Source: FrequencyWords open word-frequency list.

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 1,488 “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

  1. 1
    Internationaler Standard für digitale Telekommunikationsnetze

Recorded use

Wiktionary example

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

  1. „Es gibt mehrere technische Möglichkeiten, um Netzwerke zu realisieren. …

Synonyms

ISDN-Netz

This word in other languages

RNIS(Français)

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.

idsn2isddn1isdnn1issdn1
Edit distance from "ISDN"

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"?
"ISDN" is spelled I-S-D-N. The IPA pronunciation is [ˌiːʔɛsdeːˈʔɛn].
What does "ISDN" mean?
As an abbreviation, "ISDN" means: Internationaler Standard für digitale Telekommunikationsnetze
What words are commonly confused with "ISDN"?
"ISDN" is commonly confused with "ist", "iss", "ISO". These words look or sound similar but have different meanings. PlainSpell provides detailed comparisons for each pair.
How do you pronounce "ISDN"?
The IPA (International Phonetic Alphabet) transcription for "ISDN" is [ˌiːʔɛsdeːˈʔɛn]. Click the speaker icon on the pronunciation badge above to hear it spoken aloud where audio is available.
What language does "ISDN" come from?
"ISDN" is a German word. PlainSpell covers definitions, pronunciations, and spelling data across English, Spanish, Portuguese, French, and German.
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 German words by spelling shape

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

Same letter count

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

Iowa#31,112Gaul#31,055Nemo#31,193Pfau#31,215

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

Source: FrequencyWords open word-frequency list