ISDN vs iss, What's the Difference?

Which to use

“ISDN” is an abbrev and “iss” is a verb - they look or sound alike but fill different roles in a sentence.

#31,114
“ISDN” frequency rank: #6,551
“iss” frequency rank: 37665
confusion score

Side-by-Side Comparison

Feature	ISDN	iss
Definition	Internationaler Standard für digitale Telekommunikationsnetze	2. Person Singular Imperativ des Verbs essen

Where the spellings diverge

Shared letters are muted; the letters that actually set ISDN and iss apart are highlighted. They share 2 letters in sequence, which is exactly why the eye skips the difference.

4 ch

ISDN

3 ch

iss

Spelling & Dictionary Insight

These two trip readers on the page rather than in the ear: ISDN is [ˌiːʔɛsdeːˈʔɛn] while iss is [ɪs]. 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 (abbrev vs verb), which is usually the fastest check. Our composite confusion score for this pair is 37665, 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]. iss is at rank #6,551, tagged as averb, pronounced [ɪs].

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 37665, this pair ranks #1,584,238 of 2,006,359 scored German confusable pairs - a relatively easy-to-tell-apart pair.

Orthographic DNA of ISDN vs iss

Shared letters: is. Private to "ISDN": dn. Private to "iss": -.

"ISDN" · 4 letters · shape VCCC · "iss" · 3 letters · shape VCC

Known mistypes of this pair

ISDN ← idsn · isddn · isdnn · issdn

Frequency comparison

ISDN#31,114

iss#6,551

Source: FrequencyWords open word-frequency list

Frequently Asked Questions

Can "ISDN" and "iss" be used interchangeably?

No - they are not even the same part of speech. "ISDN" is an abbrev and "iss" a verb, so a sentence built for one is usually ungrammatical with the other.

Which is more common, "ISDN" or "iss"?

"iss" is the more common of the two: it sits at frequency rank #6,551 in our German list, against #31,114 for "ISDN". The two are close in frequency, so neither is a safe default; check the meaning rather than guessing.

Remembering ISDN vs iss

The fastest way to pick the right one every time.

Check the role first: if you need an abbrev, it's “ISDN”; for a verb, it's “iss”.
See each word in full, definition, IPA, etymology and its other confusables. Full “ISDN” entry
Browse more pairs most likely to be confused. Most confusable