Which to use
“ISDN” and “ISIS” are a confusable German pair: similar on the page, but distinct in meaning, check the gloss before you choose.
- #31,114
- “ISDN” frequency rank
- #7,491
- “ISIS” frequency rank
- 38605
- confusion score
Side-by-Side Comparison
| Feature | ISDN | ISIS |
|---|---|---|
| Definition | Internationaler Standard für digitale Telekommunikationsnetze | Abkürzung für die Terrorgruppe „Islamischer Staat im Irak und Syrien“ bzw. „Islamischer Staat im Irak und in Syrien“ bzw. „Islamischer Staat im Irak und in (Groß-)Syrien“ |
Letter map: ISDN vs ISIS
Shared letters muted; letters that set ISDN and ISIS apart highlighted. Shared run: 2. ISDN (VCCC) and ISIS (VCVC) run the same length but a different consonant-vowel pattern - the shape difference is usually the fastest tell.
Spelling & dictionary notes on ISDN vs ISIS
ISDN and ISIS are indexed as a confusable German pair. We have no recorded pronunciation or part of speech for both members, so the spelling overlap is what we can show you: they share most of their letters but differ in 2 positions. Our composite confusion score for this pair is 38605, derived from the frequency rank of both members and their visual similarity.
ISDN is recorded at frequency rank #31,114, classified as anabbrev, pronounced [ˌiːʔɛsdeːˈʔɛn]. ISIS is at rank #7,491, 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 38605, this pair ranks #1,559,545 of 2,006,359 scored German confusable pairs - a relatively easy-to-tell-apart pair.
Orthographic DNA of ISDN vs ISIS
Shared letters: is. Private to "ISDN": dn. Private to "ISIS": -.
"ISDN" · 4 letters · shape VCCC · "ISIS" · 4 letters · shape VCVC
Known mistypes of this pair
Frequently Asked Questions
Can "ISDN" and "ISIS" be used interchangeably?
Which is more common, "ISDN" or "ISIS"?
After this comparison
You've compared "ISDN" and "ISIS". Here's where to go from here.
- Full dictionary entry for "ISDN" with definition, IPA, and generated misspellings. Word entry
- Full dictionary entry for "ISIS" - compare definitions side by side with the headword page. Word entry
- This pair ranks #1,559,545 of 2,006,359 scored German confusable pairs in this corpus vintage. Corpus statistics
- "ISDN" and "ISIS" also get mixed up with nearby pairs, the highest-scored neighbour is "idF vs ISDN". 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 #1,559,545 of 2,006,359 scored German pairs, corpus vintage 2026-09-03, not spelling advice.