oíavsonzaWhich spelling fits?

Quick tell: oía is a verb, onza is a noun, so they fill different roles in a sentence.

Which to use

“oía” is a verb and “onza” is a noun - they look or sound alike but fill different roles in a sentence.

#21,424
“oía” frequency rank
#36,194
“onza” frequency rank
57618
confusion score

Side-by-Side Comparison

Feature oía onza
Definition Primera persona del singular (yo) del pretérito imperfecto de indicativo de oír. Unidad de masa, equivalente a 28,7 g. o a 1/16 de libra.

Where the eye mixes oía and onza

Muted = shared; highlighted = the visual trap. They share 2 letters in sequence. oía runs 3 letters (VVV) against onza's 4 (VCCV) - the length gap alone is often enough to separate them once you know to check it.

3 ch
oía
4 ch
onza

Why the eye confuses oía with onza

These two trip readers on the page rather than in the ear: oía is [oˈia] while onza is [ˈõnsa]. Spoken aloud the problem disappears. In writing it persists, because they differ by 1 letter(s) in length, and the parts of speech differ too (verb vs noun), which is usually the fastest check. Our composite confusion score for this pair is 57618, derived from the frequency rank of both members and their visual similarity.

oía is recorded at frequency rank #21,424, classified as averb, pronounced [oˈia]. onza is at rank #36,194, tagged as anoun, pronounced [ˈõnsa].

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 57618, this pair ranks #69,765 of 323,831 scored Spanish confusable pairs - among the most confusable pairs.

Orthographic DNA of oía vs onza

Shared letters: ao. Private to "oía": í. Private to "onza": nz.

"oía" · 3 letters · shape VVV  ·  "onza" · 4 letters · shape VCCV

Known mistypes of this pair

  • onza ← noza · onaz · onnza · onzza

Frequently Asked Questions

Do "oía" and "onza" mean the same thing in a sentence?
No - they are not even the same part of speech. "oía" is a verb and "onza" a noun, so a sentence built for one is usually ungrammatical with the other.
Which is more common, "oía" or "onza"?
"oía" is the more common of the two: it sits at frequency rank #21,424 in our Spanish list, against #36,194 for "onza". The two are close in frequency, so neither is a safe default; check the meaning rather than guessing.

After this comparison

Pronunciation already separates them, if the page still looks alike, the dictionary links below settle it.

  • Full dictionary entry for "oía" with definition, IPA, and generated misspellings. Word entry
  • Full dictionary entry for "onza" - compare definitions side by side with the headword page. Word entry
  • This pair ranks #69,765 of 323,831 scored Spanish confusable pairs in this corpus vintage. Corpus statistics
  • "oía" and "onza" 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 #69,765 of 323,831 scored Spanish pairs, corpus vintage 2026-09-03, not spelling advice.

Source: Wiktionary (via kaikki.org) Structured Wiktionary extract

Source: FrequencyWords open word-frequency list