IsaacvsopenConfusable pair

Quick tell: Isaac is a name, open is an adjective, so they fill different roles in a sentence.

Which to use

“Isaac” is a name and “open” is an adjective - they look or sound alike but fill different roles in a sentence.

#16,741
“Isaac” frequency rank
#2,607
“open” frequency rank
19348
confusion score

Side-by-Side Comparison

Feature Isaac open
Definition männlicher Vorname etwas ist nicht geschlossen

Letter map: Isaac vs open

Shared letters muted; letters that set Isaac and open apart highlighted. No shared letter run.

5 ch
Isaac
4 ch
open

Role in the sentence - Isaac and open

Our dataset has no pronunciation recorded for both members, so the reliable separator here is grammatical: Isaac is aname and openanadjective. On the page they differ by 1 letter(s) in length. Our composite confusion score for this pair is 19348, derived from the frequency rank of both members and their visual similarity.

Isaac is recorded at frequency rank #16,741, classified as aname, pronounced […]. open is at rank #2,607, tagged as anadj, pronounced […].

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 19348, this pair ranks #1,909,301 of 2,006,359 scored German confusable pairs - a relatively easy-to-tell-apart pair.

Orthographic DNA of Isaac vs open

Shared letters: none. Private to "Isaac": acis. Private to "open": enop.

"Isaac" · 5 letters · shape VCVVC  ·  "open" · 4 letters · shape VCVC

Known mistypes of this pair

  • Isaaciasac · isaacc · isac · isaca · issaac · siaac
  • openoepn · openn · opne · oppen · poen

Frequently Asked Questions

Is swapping "Isaac" for "open" ever safe?
No - they are not even the same part of speech. "Isaac" is a name and "open" an adjective, so a sentence built for one is usually ungrammatical with the other.
In ordinary German text, does "Isaac" or "open" show up more?
"open" is the more common of the two: it sits at frequency rank #2,607 in our German list, against #16,741 for "Isaac". The two are close in frequency, so neither is a safe default; check the meaning rather than guessing.

After this comparison

Done with this confusable. These links stay specific to "Isaac" and "open".

  • Full dictionary entry for "Isaac" with definition, IPA, and generated misspellings. Word entry
  • Full dictionary entry for "open" - compare definitions side by side with the headword page. Word entry
  • This pair ranks #1,909,301 of 2,006,359 scored German confusable pairs in this corpus vintage. Corpus statistics
  • "Isaac" and "open" also get mixed up with nearby pairs, the highest-scored neighbour is "Isaac vs puzzles". 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 #1,909,301 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