Which to use
“oca” is a noun and “opaca” is a verb - they look or sound alike but fill different roles in a sentence.
- #17,772
- “oca” frequency rank
- #32,783
- “opaca” frequency rank
- 50555
- confusion score
Side-by-Side Comparison
| Feature | oca | opaca |
|---|---|---|
| Definition | Ánsar común domesticado. Se cría para aprovechar su carne, huevos e hígado, este último materia prima del paté o foie gras. Es un ave de tamaño mediano, con cuerpo robusto y plumaje blanco, gris o pardo. Tiene cuello arqueado y pico grueso, con color encendido, lo mismo que sus patas que están adaptadas para la natación. | Tercera persona del singular (él, ella, ello; usted, 2.ª persona) del presente de indicativo de opacar. |
Where the eye mixes oca and opaca
Muted = shared; highlighted = the visual trap. They share 3 letters in sequence.
Look-alike desk: oca vs opaca
These two trip readers on the page rather than in the ear: oca is [ˈoka] while opaca is [oˈpaka]. 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 verb), which is usually the fastest check. Our composite confusion score for this pair is 50555, derived from the frequency rank of both members and their visual similarity.
oca is recorded at frequency rank #17,772, classified as anoun, pronounced [ˈoka]. opaca is at rank #32,783, tagged as averb, pronounced [oˈpaka].
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 50555, this pair ranks #102,578 of 323,831 scored Spanish confusable pairs - roughly mid-pack for confusability.
Orthographic DNA of oca vs opaca
Shared letters: aco. Private to "oca": -. Private to "opaca": p.
"oca" · 3 letters · shape VCV · "opaca" · 5 letters · shape VCVCV
Known mistypes of this pair
- opaca ← oapca · opaac · opacca · opcaa · oppaca · poaca
Frequently Asked Questions
Can "oca" and "opaca" be used interchangeably?
Which is more common, "oca" or "opaca"?
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 "oca" with definition, IPA, and generated misspellings. Word entry
- Full dictionary entry for "opaca" - compare definitions side by side with the headword page. Word entry
- This pair ranks #102,578 of 323,831 scored Spanish confusable pairs in this corpus vintage. Corpus statistics
- "oca" and "opaca" also get mixed up with nearby pairs, the highest-scored neighbour is "opaca vs orca". 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 #102,578 of 323,831 scored Spanish pairs, corpus vintage 2026-09-03, not spelling advice.