castavscautoWhich spelling fits?

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

Which to use

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

#10,994
“casta” frequency rank
#44,034
“cauto” frequency rank
55028
confusion score

Side-by-Side Comparison

Feature casta cauto
Definition Grupo unido por una ascendencia común. Que actúa con reserva y sigilo para evitar posibles daños o inconvenientes

Where the eye mixes casta and cauto

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

5 ch
casta
5 ch
cauto

Look-alike desk: casta vs cauto

These two trip readers on the page rather than in the ear: casta is [ˈkast̪a] while cauto is [ˈkawt̪o]. 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 55028, derived from the frequency rank of both members and their visual similarity.

casta is recorded at frequency rank #10,994, classified as anoun, pronounced [ˈkast̪a]. cauto is at rank #44,034, tagged as anadj, pronounced [ˈkawt̪o].

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 55028, this pair ranks #80,722 of 323,831 scored Spanish confusable pairs - among the most confusable pairs.

Orthographic DNA of casta vs cauto

Shared letters: act. Private to "casta": s. Private to "cauto": ou.

"casta" · 5 letters · shape CVCCV  ·  "cauto" · 5 letters · shape CVVCV

Known mistypes of this pair

  • castaacsta · casat · cassta · castta · catsa · ccasta · csata
  • cautoacuto · catuo · cauot · cautto · ccauto · cuato

Frequently Asked Questions

Is swapping "casta" for "cauto" ever safe?
No - they are not even the same part of speech. "casta" is a noun and "cauto" an adjective, so a sentence built for one is usually ungrammatical with the other.
Which is more common, "casta" or "cauto"?
"casta" is the more common of the two: it sits at frequency rank #10,994 in our Spanish list, against #44,034 for "cauto". The two are close in frequency, so neither is a safe default; check the meaning rather than guessing.

What to do next

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

  • Full dictionary entry for "casta" with definition, IPA, and generated misspellings. Word entry
  • Full dictionary entry for "cauto" - compare definitions side by side with the headword page. Word entry
  • This pair ranks #80,722 of 323,831 scored Spanish confusable pairs in this corpus vintage. Corpus statistics
  • "casta" and "cauto" also get mixed up with nearby pairs, the highest-scored neighbour is "cart vs cauto". 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 #80,722 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