OpalvsOperWhat's the difference?

Which to use

“Opal” and “Oper” are a confusable German pair: similar on the page, but distinct in meaning, check the gloss before you choose.

#47,621
“Opal” frequency rank
#4,455
“Oper” frequency rank
52076
confusion score

Side-by-Side Comparison

Feature Opal Oper
Definition ein Edelstein aus der Mineralklasse der Oxide; als Schmuck verwendet Gattungsbezeichnung für dramatische Bühnenwerke, deren Handlung durch Gesang und Instrumentalmusik dargestellt wird

Where the eye mixes Opal and Oper

Muted = shared; highlighted = the visual trap. They share 2 letters in sequence.

4 ch
Opal
4 ch
Oper

Visual trap between Opal and Oper

A purely visual mix-up. Opal ([oˈpaːl]) and Oper ([ˈoːpɐ]) are said differently, so reading them aloud is the quickest way to catch the wrong one. On the page they stay close: they share most of their letters but differ in 2 positions. Our composite confusion score for this pair is 52076, derived from the frequency rank of both members and their visual similarity.

Opal is recorded at frequency rank #47,621, classified as anoun, pronounced [oˈpaːl]. 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 52076, this pair ranks #1,110,877 of 2,006,359 scored German confusable pairs - roughly mid-pack for confusability.

Orthographic DNA of Opal vs Oper

Shared letters: op. Private to "Opal": al. Private to "Oper": er.

"Opal" · 4 letters · shape VCVC  ·  "Oper" · 4 letters · shape VCVC

Known mistypes of this pair

  • Opaloapl · opall · opla · oppal · poal
  • Operoepr · operr · opper · opre · poer

Frequently Asked Questions

Is swapping "Opal" for "Oper" ever safe?
No. They are said differently ([oˈpaːl] versus [ˈoːpɐ]) and carry different meanings; reading the sentence aloud is usually enough to catch the wrong one.
In ordinary German text, does "Opal" or "Oper" show up more?
"Oper" is the more common of the two: it sits at frequency rank #4,455 in our German list, against #47,621 for "Opal". That is a wide gap, so in ordinary text the rarer spelling is the one worth double-checking.

After this comparison

Eye-level mix-up between "Opal" and "Oper" is sorted above. Next: full entries or other pairs that share a letter shape.

  • Full dictionary entry for "Opal" 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 #1,110,877 of 2,006,359 scored German confusable pairs in this corpus vintage. Corpus statistics
  • "Opal" and "Oper" also get mixed up with nearby pairs, the highest-scored neighbour is "Opal vs Opi". 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 #1,110,877 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