open vs Oper, What's the Difference?

Which to use

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

#2,607
“open” frequency rank: #4,455
“Oper” frequency rank: 7062
confusion score

Side-by-Side Comparison

Feature	open	Oper
Definition	etwas ist nicht geschlossen	Gattungsbezeichnung für dramatische Bühnenwerke, deren Handlung durch Gesang und Instrumentalmusik dargestellt wird

Letter map: open vs Oper

Shared letters muted; letters that set open and Oper apart highlighted. Shared run: 3.

4 ch

open

4 ch

Oper

Grammar separator: open vs Oper

Our dataset has no pronunciation recorded for both members, so the reliable separator here is grammatical: open is anadjective and Operanoun. On the page they differ by a single letter - n in “open” becomes r in “Oper”. Our composite confusion score for this pair is 7062, derived from the frequency rank of both members and their visual similarity.

open is recorded at frequency rank #2,607, classified as anadj, pronounced […]. Oper is at rank #4,455, tagged as anoun, pronounced [ˈoːpɐ].

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 7062, this pair ranks #1,989,506 of 2,006,359 scored German confusable pairs - a relatively easy-to-tell-apart pair.

Orthographic DNA of open vs Oper

Shared letters: eop. Private to "open": n. Private to "Oper": r.

"open" · 4 letters · shape VCVC · "Oper" · 4 letters · shape VCVC

Known mistypes of this pair

open ← oepn · openn · opne · oppen · poen
Oper ← oepr · operr · opper · opre · poer

Frequently Asked Questions

Is swapping "open" for "Oper" ever safe?

No - they are not even the same part of speech. "open" is an adjective and "Oper" a noun, so a sentence built for one is usually ungrammatical with the other.

Which is more common, "open" or "Oper"?

"open" is the more common of the two: it sits at frequency rank #2,607 in our German list, against #4,455 for "Oper". The two are close in frequency, so neither is a safe default; check the meaning rather than guessing.

Useful next steps

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

Full dictionary entry for "open" with definition, IPA, and generated misspellings. Word entry
Full dictionary entry for "Oper" - compare definitions side by side with the headword page. Word entry
This pair ranks #1,989,506 of 2,006,359 scored German confusable pairs in this corpus vintage. Corpus statistics
"open" and "Oper" also get mixed up with nearby pairs, the highest-scored neighbour is "open 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 #1,989,506 of 2,006,359 scored German pairs, corpus vintage 2026-09-03, not spelling advice.