casavscasualWhich spelling fits?

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

Which to use

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

#91
“casa” frequency rank
#12,840
“casual” frequency rank
12931
confusion score

Side-by-Side Comparison

Feature casa casual
Definition construção que serve de moradia diz-se daquilo que depende do acaso para ocorrer, acidental, eventual

Letter map: casa vs casual

Shared letters muted; letters that set casa and casual apart highlighted. Shared run: 4. casa runs 4 letters (CVCV) against casual's 6 (CVCVVC) - the length gap alone is often enough to separate them once you know to check it.

4 ch
casa
6 ch
casual

Grammar separator: casa vs casual

Our dataset has no pronunciation recorded for both members, so the reliable separator here is grammatical: casa is anoun and casualanadjective. On the page they differ by 2 letter(s) in length. Our composite confusion score for this pair is 12931, derived from the frequency rank of both members and their visual similarity.

casa is recorded at frequency rank #91, classified as anoun, pronounced /ˈka.zɐ/. casual is at rank #12,840, tagged as anadj.

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 12931, this pair ranks #59,532 of 75,631 scored Portuguese confusable pairs - a relatively easy-to-tell-apart pair.

Orthographic DNA of casa vs casual

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

"casa" · 4 letters · shape CVCV  ·  "casual" · 6 letters · shape CVCVVC

Known mistypes of this pair

  • casa ← acsa · caas · cassa · ccasa · csaa
  • casual ← acsual · casaul · cassual · casuall · casula · ccasual · csaual

Frequently Asked Questions

Can "casa" and "casual" be used interchangeably?
No - they are not even the same part of speech. "casa" is a noun and "casual" an adjective, so a sentence built for one is usually ungrammatical with the other.
Which is more common, "casa" or "casual"?
"casa" is the more common of the two: it sits at frequency rank #91 in our Portuguese list, against #12,840 for "casual". That is a wide gap, so in ordinary text the rarer spelling is the one worth double-checking.

What to do next

Pair "casa" vs "casual" is on the table, pick a follow-up below.

  • Full dictionary entry for "casa" with definition, IPA, and generated misspellings. Word entry
  • Full dictionary entry for "casual" - compare definitions side by side with the headword page. Word entry
  • This pair ranks #59,532 of 75,631 scored Portuguese confusable pairs in this corpus vintage. Corpus statistics
  • "casa" and "casual" also get mixed up with nearby pairs, the highest-scored neighbour is "casual vs caudal". 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 #59,532 of 75,631 scored Portuguese pairs, corpus vintage 2026-09-03, not spelling advice.

Source: Wiktionary (via kaikki.org) Structured Wiktionary extract

Source: FrequencyWords open word-frequency list