casto vs cat, What's the Difference?

Which to use

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

#44,616
“casto” frequency rank: #10,282
“cat” frequency rank: 54898
confusion score

Side-by-Side Comparison

Feature	casto	cat
Definition	Persona que se abstiene de todo goce sexual o lo vive de acuerdo a ciertas directrices dictadas por su religión o su moral.	(Felis silvestris catus) Gato.

Where the spellings diverge

Shared letters are muted; the letters that actually set casto and cat apart are highlighted. They share 3 letters in sequence, which is exactly why the eye skips the difference.

5 ch

casto

3 ch

cat

Spelling & Dictionary Insight

These two trip readers on the page rather than in the ear: casto is [ˈkast̪o] while cat is [ˈkaʰt̪]. Spoken aloud the problem disappears. In writing it persists, because they differ by 2 letter(s) in length, and the parts of speech differ too (adjective vs noun), which is usually the fastest check. Our composite confusion score for this pair is 54898, derived from the frequency rank of both members and their visual similarity.

casto is recorded at frequency rank #44,616, classified as anadj, pronounced [ˈkast̪o]. cat is at rank #10,282, tagged as anoun, pronounced [ˈkaʰt̪].

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 54898, this pair ranks #81,303 of 323,831 scored Spanish confusable pairs - among the most confusable pairs.

Orthographic DNA of casto vs cat

Shared letters: act. Private to "casto": os. Private to "cat": -.

"casto" · 5 letters · shape CVCCV · "cat" · 3 letters · shape CVC

Known mistypes of this pair

casto ← acsto · casot · cassto · castto · catso · ccasto · csato

Frequency comparison

casto#44,616

cat#10,282

Source: FrequencyWords open word-frequency list

Frequently Asked Questions

Can "casto" and "cat" be used interchangeably?

No - they are not even the same part of speech. "casto" is an adjective and "cat" a noun, so a sentence built for one is usually ungrammatical with the other.

Which is more common, "casto" or "cat"?

"cat" is the more common of the two: it sits at frequency rank #10,282 in our Spanish list, against #44,616 for "casto". The two are close in frequency, so neither is a safe default; check the meaning rather than guessing.

Remembering casto vs cat

The fastest way to pick the right one every time.

Check the role first: if you need an adjective, it's “casto”; for a noun, it's “cat”.
See each word in full, definition, IPA, etymology and its other confusables. Full “casto” entry
Browse more pairs most likely to be confused. Most confusable