casavscausalWhich spelling fits?

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

Which to use

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

#136
“casa” frequency rank
#21,924
“causal” frequency rank
22060
confusion score

Side-by-Side Comparison

Feature casa causal
Definition Edificación destinada a vivienda. Que pertenece o concierne a la causa (en sus diferentes acepciones).

Where the eye mixes casa and causal

Muted = shared; highlighted = the visual trap. They share 4 letters in sequence.

4 ch
casa
6 ch
causal

Look-alike desk: casa vs causal

These two trip readers on the page rather than in the ear: casa is [ˈkasa] while causal is [kawˈsal]. 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 (noun vs adjective), which is usually the fastest check. Our composite confusion score for this pair is 22060, derived from the frequency rank of both members and their visual similarity.

casa is recorded at frequency rank #136, classified as anoun, pronounced [ˈkasa]. causal is at rank #21,924, tagged as anadj, pronounced [kawˈsal].

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 22060, this pair ranks #252,122 of 323,831 scored Spanish confusable pairs - a relatively easy-to-tell-apart pair.

Orthographic DNA of casa vs causal

Shared letters: acs. Private to "casa": -. Private to "causal": lu.

"casa" · 4 letters · shape CVCV  ·  "causal" · 6 letters · shape CVVCVC

Known mistypes of this pair

  • casaacsa · caas · cassa · ccasa · csaa
  • causalacusal · cauasl · causall · causla · caussal · ccausal · cuasal

Frequently Asked Questions

Is swapping "casa" for "causal" ever safe?
No - they are not even the same part of speech. "casa" is a noun and "causal" an adjective, so a sentence built for one is usually ungrammatical with the other.
In ordinary Spanish text, does "casa" or "causal" show up more?
"casa" is the more common of the two: it sits at frequency rank #136 in our Spanish list, against #21,924 for "causal". That is a wide gap, so in ordinary text the rarer spelling is the one worth double-checking.

What to do next

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

  • Full dictionary entry for "casa" with definition, IPA, and generated misspellings. Word entry
  • Full dictionary entry for "causal" - compare definitions side by side with the headword page. Word entry
  • This pair ranks #252,122 of 323,831 scored Spanish confusable pairs in this corpus vintage. Corpus statistics
  • "casa" and "causal" also get mixed up with nearby pairs, the highest-scored neighbour is "causal vs censal". 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 #252,122 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