Which to use
“opal” and “opus” are a confusable English pair: similar on the page, but distinct in meaning, check the gloss before you choose.
- #22,458
- “opal” frequency rank
- #23,619
- “opus” frequency rank
- 46077
- confusion score
Side-by-Side Comparison
| Feature | opal | opus |
|---|---|---|
| Definition | A mineral consisting, like quartz, of silica, but inferior to quartz in hardness and specific gravity, of the chemical formula SiO₂·nH₂O. | A work of music or set of works with a specified rank in an ordering of a composer's complete published works. |
Where the eye mixes opal and opus
Muted = shared; highlighted = the visual trap. They share 2 letters in sequence.
Why the eye confuses opal with opus
A purely visual mix-up. opal (/ˈəʊpəl/) and opus (/ˈəʊpəs/) 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 46077, derived from the frequency rank of both members and their visual similarity.
opal is recorded at frequency rank #22,458, classified as anoun, pronounced /ˈəʊpəl/. opus is at rank #23,619, tagged as anoun, pronounced /ˈəʊpəs/.
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 46077, this pair ranks #215,211 of 530,003 scored English confusable pairs - roughly mid-pack for confusability.
Orthographic DNA of opal vs opus
Shared letters: op. Private to "opal": al. Private to "opus": su.
"opal" · 4 letters · shape VCVC · "opus" · 4 letters · shape VCVC
Known mistypes of this pair
Frequently Asked Questions
Can "opal" and "opus" be used interchangeably?
Frequency check: "opal" vs "opus" - which ranks higher?
What to do next
Pronunciation already separates them, if the page still looks alike, the dictionary links below settle it.
- Full dictionary entry for "opal" with definition, IPA, and generated misspellings. Word entry
- Full dictionary entry for "opus" - compare definitions side by side with the headword page. Word entry
- This pair ranks #215,211 of 530,003 scored English confusable pairs in this corpus vintage. Corpus statistics
- "opal" and "opus" also get mixed up with nearby pairs, the highest-scored neighbour is "opus vs OWS". 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 #215,211 of 530,003 scored English pairs, corpus vintage 2026-09-03, not spelling advice.