Which to use
“opus” is a noun and “os” is a pronoun - they look or sound alike but fill different roles in a sentence.
- #16,657
- “opus” frequency rank
- #449
- “os” frequency rank
- 17106
- confusion score
Side-by-Side Comparison
| Feature | opus | os |
|---|---|---|
| Definition | Trabajo. | Caso acusativo y dativo del pronombre personal vosotros, una de las formas de la segunda persona del plural en español. |
Where the eye mixes opus and os
Muted = shared; highlighted = the visual trap. They share 2 letters in sequence.
Visual trap between opus and os
These two trip readers on the page rather than in the ear: opus is /ˈo.pus/ while os is [os]. Spoken aloud the problem disappears. In writing it persists, because they differ by 2 letter(s) in length, and the parts of speech differ too (noun vs pronoun), which is usually the fastest check. Our composite confusion score for this pair is 17106, derived from the frequency rank of both members and their visual similarity.
opus is recorded at frequency rank #16,657, classified as anoun, pronounced /ˈo.pus/. os is at rank #449, tagged as apron, pronounced [os].
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 17106, this pair ranks #273,532 of 323,831 scored Spanish confusable pairs - a relatively easy-to-tell-apart pair.
Orthographic DNA of opus vs os
Shared letters: os. Private to "opus": pu. Private to "os": -.
"opus" · 4 letters · shape VCVC · "os" · 2 letters · shape VC
Known mistypes of this pair
- opus ← oppus · opsu · opuss · oups · pous
Frequently Asked Questions
Can "opus" and "os" be used interchangeably?
Frequency check: "opus" vs "os" - which ranks higher?
What to do next
Visual near-miss handled. Browse the word pages or a neighbour when the next look-alike shows up.
- Full dictionary entry for "opus" with definition, IPA, and generated misspellings. Word entry
- Full dictionary entry for "os" - compare definitions side by side with the headword page. Word entry
- This pair ranks #273,532 of 323,831 scored Spanish confusable pairs in this corpus vintage. Corpus statistics
- "opus" and "os" also get mixed up with nearby pairs, the highest-scored neighbour is "ones vs opus". 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 #273,532 of 323,831 scored Spanish pairs, corpus vintage 2026-09-03, not spelling advice.