Which to use
“casa” is a noun and “Casas” is a name - they look or sound alike but fill different roles in a sentence.
- #14,082
- “casa” frequency rank
- #43,560
- “Casas” frequency rank
- 57642
- confusion score
Side-by-Side Comparison
| Feature | casa | Casas |
|---|---|---|
| Definition | house | A surname from Spanish. |
Letter map: casa vs Casas
Shared letters muted; letters that set casa and Casas apart highlighted. Shared run: 4. casa runs 4 letters (CVCV) against Casas's 5 (CVCVC) - the length gap alone is often enough to separate them once you know to check it.
Role in the sentence - casa and Casas
Our dataset has no pronunciation recorded for both members, so the reliable separator here is grammatical: casa is anoun and Casasaname. On the page they differ by 1 extra letter(s) - “casa” sits inside “Casas”. Our composite confusion score for this pair is 57642, derived from the frequency rank of both members and their visual similarity.
casa is recorded at frequency rank #14,082, classified as anoun, pronounced /ˈkɑːsə/. Casas is at rank #43,560, tagged as aname.
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 57642, this pair ranks #117,986 of 530,003 scored English confusable pairs - among the most confusable pairs.
Orthographic DNA of casa vs Casas
Shared letters: acs. Private to "casa": -. Private to "Casas": -.
"casa" · 4 letters · shape CVCV · "Casas" · 5 letters · shape CVCVC
Known mistypes of this pair
Frequently Asked Questions
Do "casa" and "Casas" mean the same thing in a sentence?
Which is more common, "casa" or "Casas"?
Useful next steps
You've compared "casa" and "Casas". Here's where to go from here.
- Full dictionary entry for "casa" with definition, IPA, and generated misspellings. Word entry
- Full dictionary entry for "Casas" - compare definitions side by side with the headword page. Word entry
- This pair ranks #117,986 of 530,003 scored English confusable pairs in this corpus vintage. Corpus statistics
- "casa" and "Casas" also get mixed up with nearby pairs, the highest-scored neighbour is "Casas vs cates". 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 #117,986 of 530,003 scored English pairs, corpus vintage 2026-09-03, not spelling advice.