omisovsopusoWhat's the difference?

Quick tell: omiso is a adjective, opuso is a verb, so they fill different roles in a sentence.

Which to use

“omiso” is an adjective and “opuso” is a verb - they look or sound alike but fill different roles in a sentence.

#23,884
“omiso” frequency rank
#15,187
“opuso” frequency rank
39071
confusion score

Side-by-Side Comparison

Feature omiso opuso
Definition Sin la tenacidad ni el cuidado debidos. Tercera persona del singular (él, ella, ello; usted, 2.ª persona) del pretérito perfecto simple de indicativo de oponer o de oponerse.

Where the eye mixes omiso and opuso

Muted = shared; highlighted = the visual trap. They share 3 letters in sequence.

5 ch
omiso
5 ch
opuso

Look-alike desk: omiso vs opuso

These two trip readers on the page rather than in the ear: omiso is [oˈmiso] while opuso is [oˈpuso]. 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 (adjective vs verb), which is usually the fastest check. Our composite confusion score for this pair is 39071, derived from the frequency rank of both members and their visual similarity.

omiso is recorded at frequency rank #23,884, classified as anadj, pronounced [oˈmiso]. opuso is at rank #15,187, tagged as averb, pronounced [oˈpuso].

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 39071, this pair ranks #166,542 of 323,831 scored Spanish confusable pairs - roughly mid-pack for confusability.

Orthographic DNA of omiso vs opuso

Shared letters: os. Private to "omiso": im. Private to "opuso": pu.

"omiso" · 5 letters · shape VCVCV  ·  "opuso" · 5 letters · shape VCVCV

Known mistypes of this pair

  • omisomoiso · oimso · omios · omisso · ommiso · omsio
  • opusooppuso · opsuo · opuos · opusso · oupso · pouso

Frequently Asked Questions

Can "omiso" and "opuso" be used interchangeably?
No - they are not even the same part of speech. "omiso" is an adjective and "opuso" a verb, so a sentence built for one is usually ungrammatical with the other.
Frequency check: "omiso" vs "opuso" - which ranks higher?
"opuso" is the more common of the two: it sits at frequency rank #15,187 in our Spanish list, against #23,884 for "omiso". The two are close in frequency, so neither is a safe default; check the meaning rather than guessing.

Useful next steps

Eye-level mix-up between "omiso" and "opuso" is sorted above. Next: full entries or other pairs that share a letter shape.

  • Full dictionary entry for "omiso" with definition, IPA, and generated misspellings. Word entry
  • Full dictionary entry for "opuso" - compare definitions side by side with the headword page. Word entry
  • This pair ranks #166,542 of 323,831 scored Spanish confusable pairs in this corpus vintage. Corpus statistics
  • "omiso" and "opuso" also get mixed up with nearby pairs, the highest-scored neighbour is "ojito vs omiso". 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 #166,542 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