casovscuyoTell them apart

Quick tell: caso is a noun, cuyo is an adjective, so they fill different roles in a sentence.

Which to use

“caso” is a noun and “cuyo” is an adjective - they look or sound alike but fill different roles in a sentence.

#157
“caso” frequency rank
#1,240
“cuyo” frequency rank
1397
confusion score

Side-by-Side Comparison

Feature caso cuyo
Definition Cada una de varias instancias consideradas como pertenecientes a un mismo tipo de situaciones o cosas (como los casos de una enfermedad, etc.). Caso de genitivo del pronombre relativo, equivalente a de quien, de que o del cual.

Where the eye mixes caso and cuyo

Muted = shared; highlighted = the visual trap. They share 2 letters in sequence.

4 ch
caso
4 ch
cuyo

Visual trap between caso and cuyo

These two trip readers on the page rather than in the ear: caso is [ˈkaso] while cuyo is [ˈkuʝo]. 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 adjective), which is usually the fastest check. Our composite confusion score for this pair is 1397, derived from the frequency rank of both members and their visual similarity.

caso is recorded at frequency rank #157, classified as anoun, pronounced [ˈkaso]. cuyo is at rank #1,240, tagged as anadj, pronounced [ˈkuʝo].

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 1397, this pair ranks #322,129 of 323,831 scored Spanish confusable pairs - a relatively easy-to-tell-apart pair.

Orthographic DNA of caso vs cuyo

Shared letters: co. Private to "caso": as. Private to "cuyo": uy.

"caso" · 4 letters · shape CVCV  ·  "cuyo" · 4 letters · shape CVVV

Known mistypes of this pair

  • casoacso · casso · ccaso · csao
  • cuyoccuyo · cuoy · cuyyo · cyuo · ucyo

Frequently Asked Questions

Is swapping "caso" for "cuyo" ever safe?
No - they are not even the same part of speech. "caso" is a noun and "cuyo" an adjective, so a sentence built for one is usually ungrammatical with the other.
In ordinary Spanish text, does "caso" or "cuyo" show up more?
"caso" is the more common of the two: it sits at frequency rank #157 in our Spanish list, against #1,240 for "cuyo". The two are close in frequency, so neither is a safe default; check the meaning rather than guessing.

After this comparison

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

  • Full dictionary entry for "caso" with definition, IPA, and generated misspellings. Word entry
  • Full dictionary entry for "cuyo" - compare definitions side by side with the headword page. Word entry
  • This pair ranks #322,129 of 323,831 scored Spanish confusable pairs in this corpus vintage. Corpus statistics
  • "caso" and "cuyo" also get mixed up with nearby pairs, the highest-scored neighbour is "cuc vs cuyo". 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 #322,129 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