Which to use
“cais” and “cio” are a confusable Portuguese pair: similar on the page, but distinct in meaning, check the gloss before you choose.
- #10,845
- “cais” frequency rank
- #22,564
- “cio” frequency rank
- 33409
- confusion score
Side-by-Side Comparison
| Feature | cais | cio |
|---|---|---|
| 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 | período de maior apetite sexual e fertilidade de certos animais |
Where the eye mixes cais and cio
Muted = shared; highlighted = the visual trap. They share 2 letters in sequence.
Visual trap between cais and cio
A purely visual mix-up. cais (/ˈkajʃ/) and cio (/ˈsi.u/) are said differently, so reading them aloud is the quickest way to catch the wrong one. On the page they stay close: they differ by 1 letter(s) in length. Our composite confusion score for this pair is 33409, 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/. cio is at rank #22,564, tagged as anoun, pronounced /ˈsi.u/.
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 33409, this pair ranks #34,123 of 75,631 scored Portuguese confusable pairs - roughly mid-pack for confusability.
Orthographic DNA of cais vs cio
Shared letters: ci. Private to "cais": as. Private to "cio": o.
"cais" · 4 letters · shape CVVC · "cio" · 3 letters · shape CVV
Known mistypes of this pair
- cais ← acis · caiss · casi · ccais · cias
Frequently Asked Questions
Do "cais" and "cio" mean the same thing in a sentence?
Which is more common, "cais" or "cio"?
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 "cio" - compare definitions side by side with the headword page. Word entry
- This pair ranks #34,123 of 75,631 scored Portuguese confusable pairs in this corpus vintage. Corpus statistics
- "cais" and "cio" also get mixed up with nearby pairs, the highest-scored neighbour is "ciao vs cio". 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 #34,123 of 75,631 scored Portuguese pairs, corpus vintage 2026-09-03, not spelling advice.