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 spellings diverge
Shared letters are muted; the letters that actually set OPEC and opus apart are highlighted. They share 2 letters in sequence, which is exactly why the eye skips the difference.
Spelling & Dictionary Insight
OPEC and opus form a confusable pair in the English index, two distinct headwords that are easily confused because they look alike, sound alike, or both. They share most of their letters but differ in 2 positions - close enough that the eye skips over the difference, far enough that meaning fully diverges. 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.
Frequency comparison
Frequently Asked Questions
Can "OPEC" and "opus" be used interchangeably?
Remembering OPEC vs opus
The fastest way to pick the right one every time.
- Check the role first: if you need a name, it's “OPEC”; for a noun, it's “opus”.
- See each word in full, definition, IPA, etymology and its other confusables. Full “OPEC” entry
- Browse more pairs most likely to be confused. Most confusable