Which to use
“cais” and “casa” are a confusable Portuguese pair: similar on the page, but distinct in meaning, check the gloss before you choose.
- #10,845
- “cais” frequency rank
- #91
- “casa” frequency rank
- 10936
- confusion score
Side-by-Side Comparison
| Feature | cais | casa |
|---|---|---|
| Definition | lugar à beira-mar, na margem do rio, nas estações de caminho-de-ferro ou do metropolitano apropriado para o embarque e desembarque de pessoas ou mercadorias | construção que serve de moradia |
Where the eye mixes cais and casa
Muted = shared; highlighted = the visual trap. They share 3 letters in sequence.
Why the eye confuses cais with casa
A purely visual mix-up. cais (/ˈkajʃ/) and casa (/ˈka.zɐ/) are said differently, so reading them aloud is the quickest way to catch the wrong one. On the page they stay close: they share most of their letters but differ in 2 positions. Our composite confusion score for this pair is 10936, derived from the frequency rank of both members and their visual similarity.
cais is recorded at frequency rank #10,845, classified as anoun, pronounced /ˈkajʃ/. casa is at rank #91, tagged as anoun, pronounced /ˈka.zɐ/.
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 10936, this pair ranks #62,024 of 75,631 scored Portuguese confusable pairs - a relatively easy-to-tell-apart pair.
Orthographic DNA of cais vs casa
Shared letters: acs. Private to "cais": i. Private to "casa": -.
"cais" · 4 letters · shape CVVC · "casa" · 4 letters · shape CVCV
Known mistypes of this pair
Frequently Asked Questions
Is swapping "cais" for "casa" ever safe?
Frequency check: "cais" vs "casa" - which ranks higher?
What to do next
Visual near-miss handled. Browse the word pages or a neighbour when the next look-alike shows up.
- Full dictionary entry for "cais" with definition, IPA, and generated misspellings. Word entry
- Full dictionary entry for "casa" - compare definitions side by side with the headword page. Word entry
- This pair ranks #62,024 of 75,631 scored Portuguese confusable pairs in this corpus vintage. Corpus statistics
- "cais" and "casa" also get mixed up with nearby pairs, the highest-scored neighbour is "cais vs coin". 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 #62,024 of 75,631 scored Portuguese pairs, corpus vintage 2026-09-03, not spelling advice.