casovscostoTell them apart

Which to use

“caso” and “costo” are a confusable Spanish pair: similar on the page, but distinct in meaning, check the gloss before you choose.

#157
“caso” frequency rank
#1,763
“costo” frequency rank
1920
confusion score

Side-by-Side Comparison

Feature caso costo
Definition Cada una de varias instancias consideradas como pertenecientes a un mismo tipo de situaciones o cosas (como los casos de una enfermedad, etc.). Precio pagado por un bien o servicio, o imputado a la producción de este.

Where the eye mixes caso and costo

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

4 ch
caso
5 ch
costo

Look-alike desk: caso vs costo

A purely visual mix-up. caso ([ˈkaso]) and costo ([ˈkost̪o]) are said differently, so reading them aloud is the quickest way to catch the wrong one. On the page they stay close: they differ by 1 letter(s) in length. Our composite confusion score for this pair is 1920, derived from the frequency rank of both members and their visual similarity.

caso is recorded at frequency rank #157, classified as anoun, pronounced [ˈkaso]. costo is at rank #1,763, tagged as anoun, pronounced [ˈkost̪o].

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 1920, this pair ranks #321,272 of 323,831 scored Spanish confusable pairs - a relatively easy-to-tell-apart pair.

Orthographic DNA of caso vs costo

Shared letters: cos. Private to "caso": a. Private to "costo": t.

"caso" · 4 letters · shape CVCV  ·  "costo" · 5 letters · shape CVCCV

Known mistypes of this pair

  • casoacso · casso · ccaso · csao
  • costoccosto · cosot · cossto · costto · cotso · csoto · ocsto

Frequently Asked Questions

Can "caso" and "costo" be used interchangeably?
No. They are said differently ([ˈkaso] versus [ˈkost̪o]) and carry different meanings; reading the sentence aloud is usually enough to catch the wrong one.
In ordinary Spanish text, does "caso" or "costo" show up more?
"caso" is the more common of the two: it sits at frequency rank #157 in our Spanish list, against #1,763 for "costo". That is a wide gap, so in ordinary text the rarer spelling is the one worth double-checking.

After this comparison

Visual near-miss handled. Browse the word pages or a neighbour when the next look-alike shows up.

  • Full dictionary entry for "caso" with definition, IPA, and generated misspellings. Word entry
  • Full dictionary entry for "costo" - compare definitions side by side with the headword page. Word entry
  • This pair ranks #321,272 of 323,831 scored Spanish confusable pairs in this corpus vintage. Corpus statistics
  • "caso" and "costo" also get mixed up with nearby pairs, the highest-scored neighbour is "caso vs Chasco". 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 #321,272 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