Which to use
“OPEC” is a name and “opus” is a noun - they look or sound alike but fill different roles in a sentence.
- #23,928
- “OPEC” frequency rank
- #23,619
- “opus” frequency rank
- 47547
- confusion score
Side-by-Side Comparison
| Feature | OPEC | opus |
|---|---|---|
| Definition | Acronym of Organization of Petroleum Exporting Countries. | 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 OPEC and opus
Muted = shared; highlighted = the visual trap. They share 2 letters in sequence.
Why the eye confuses OPEC with opus
These two trip readers on the page rather than in the ear: OPEC is /ˈəʊpɛk/ while opus is /ˈəʊpəs/. Spoken aloud the problem disappears. In writing it persists, because they share most of their letters but differ in 2 positions, and the parts of speech differ too (name vs noun), which is usually the fastest check. Our composite confusion score for this pair is 47547, derived from the frequency rank of both members and their visual similarity.
OPEC is recorded at frequency rank #23,928, classified as aname, pronounced /ˈəʊpɛk/. 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 47547, this pair ranks #201,460 of 530,003 scored English confusable pairs - roughly mid-pack for confusability.
Orthographic DNA of OPEC vs opus
Shared letters: op. Private to "OPEC": ce. Private to "opus": su.
"OPEC" · 4 letters · shape VCVC · "opus" · 4 letters · shape VCVC
Known mistypes of this pair
Frequently Asked Questions
Do "OPEC" and "opus" mean the same thing in a sentence?
In ordinary English text, does "OPEC" or "opus" show up more?
What to do next
Pronunciation already separates them, if the page still looks alike, the dictionary links below settle it.
- Full dictionary entry for "OPEC" 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 #201,460 of 530,003 scored English confusable pairs in this corpus vintage. Corpus statistics
- "OPEC" 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 #201,460 of 530,003 scored English pairs, corpus vintage 2026-09-03, not spelling advice.