Which to use
“onza” is a noun and “opta” is a verb - they look or sound alike but fill different roles in a sentence.
- #36,194
- “onza” frequency rank
- #24,978
- “opta” frequency rank
- 61172
- confusion score
Side-by-Side Comparison
| Feature | onza | opta |
|---|---|---|
| Definition | Unidad de masa, equivalente a 28,7 g. o a 1/16 de libra. | Tercera persona del singular (él, ella, ello; usted, 2.ª persona) del presente de indicativo de optar. |
Where the eye mixes onza and opta
Muted = shared; highlighted = the visual trap. They share 2 letters in sequence. onza and opta follow the identical consonant-vowel pattern (VCCV). Same shape at a glance is often the real trap, independent of shared letters.
Why the eye confuses onza with opta
These two trip readers on the page rather than in the ear: onza is [ˈõnsa] while opta is [ˈopt̪a]. 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 (noun vs verb), which is usually the fastest check. Our composite confusion score for this pair is 61172, derived from the frequency rank of both members and their visual similarity.
onza is recorded at frequency rank #36,194, classified as anoun, pronounced [ˈõnsa]. opta is at rank #24,978, tagged as averb, pronounced [ˈopt̪a].
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 61172, this pair ranks #56,392 of 323,831 scored Spanish confusable pairs - among the most confusable pairs.
Orthographic DNA of onza vs opta
Shared letters: ao. Private to "onza": nz. Private to "opta": pt.
"onza" · 4 letters · shape VCCV · "opta" · 4 letters · shape VCCV
Known mistypes of this pair
Frequently Asked Questions
Do "onza" and "opta" mean the same thing in a sentence?
In ordinary Spanish text, does "onza" or "opta" show up more?
Useful next steps
Visual near-miss handled. Browse the word pages or a neighbour when the next look-alike shows up.
- Full dictionary entry for "onza" with definition, IPA, and generated misspellings. Word entry
- Full dictionary entry for "opta" - compare definitions side by side with the headword page. Word entry
- This pair ranks #56,392 of 323,831 scored Spanish confusable pairs in this corpus vintage. Corpus statistics
- "onza" and "opta" also get mixed up with nearby pairs, the highest-scored neighbour is "oirá vs onza". 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 #56,392 of 323,831 scored Spanish pairs, corpus vintage 2026-09-03, not spelling advice.