Which to use
“obs” and “opus” are a confusable English pair: similar on the page, but distinct in meaning, check the gloss before you choose.
- #34,614
- “obs” frequency rank
- #23,619
- “opus” frequency rank
- 58233
- confusion score
Side-by-Side Comparison
| Feature | obs | opus |
|---|---|---|
| Definition | Police observation. | A work of music or set of works with a specified rank in an ordering of a composer's complete published works. |
Letter map: obs vs opus
Shared letters muted; letters that set obs and opus apart highlighted. Shared run: 2.
Pair insight - obs / opus
obs and opus are indexed as a confusable English pair. We have no recorded pronunciation or part of speech for both members, so the spelling overlap is what we can show you: they differ by 1 letter(s) in length. Our composite confusion score for this pair is 58233, derived from the frequency rank of both members and their visual similarity.
obs is recorded at frequency rank #34,614, classified as anoun. 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 58233, this pair ranks #113,909 of 530,003 scored English confusable pairs - among the most confusable pairs.
Orthographic DNA of obs vs opus
Shared letters: os. Private to "obs": b. Private to "opus": pu.
"obs" · 3 letters · shape VCC · "opus" · 4 letters · shape VCVC
Known mistypes of this pair
- opus ← oppus · opsu · opuss · oups · pous
Frequently Asked Questions
Is swapping "obs" for "opus" ever safe?
Frequency check: "obs" vs "opus" - which ranks higher?
After this comparison
Pair "obs" vs "opus" is on the table, pick a follow-up below.
- Full dictionary entry for "obs" 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 #113,909 of 530,003 scored English confusable pairs in this corpus vintage. Corpus statistics
- "obs" and "opus" also get mixed up with nearby pairs, the highest-scored neighbour is "obs vs omi". 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 #113,909 of 530,003 scored English pairs, corpus vintage 2026-09-03, not spelling advice.