Which to use
“cas” and “ceo” are a confusable Spanish pair: similar on the page, but distinct in meaning, check the gloss before you choose.
- #19,656
- “cas” frequency rank
- #11,189
- “ceo” frequency rank
- 30845
- confusion score
Side-by-Side Comparison
| Feature | cas | ceo |
|---|---|---|
| Definition | Caso. | (Zeus faber) Pez comestible de aguas profundas con un cuerpo comprimido lateralmente de color oliva-amarillo que tiene una gran mancha oscura ribeteada de color amarillo en su costado y grandes espinas en la aleta dorsal. |
Where the eye mixes cas and ceo
Muted = shared; highlighted = the visual trap. They share 1 letter in sequence.
Visual trap between cas and ceo
A purely visual mix-up. cas ([ˈkas]) and ceo ([ˈseo]) 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 30845, derived from the frequency rank of both members and their visual similarity.
cas is recorded at frequency rank #19,656, classified as anoun, pronounced [ˈkas]. ceo is at rank #11,189, tagged as anoun, pronounced [ˈseo].
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 30845, this pair ranks #210,031 of 323,831 scored Spanish confusable pairs - roughly mid-pack for confusability.
Orthographic DNA of cas vs ceo
Shared letters: c. Private to "cas": as. Private to "ceo": eo.
"cas" · 3 letters · shape CVC · "ceo" · 3 letters · shape CVV
Frequently Asked Questions
Do "cas" and "ceo" mean the same thing in a sentence?
In ordinary Spanish text, does "cas" or "ceo" show up more?
After this comparison
Visual near-miss handled. Browse the word pages or a neighbour when the next look-alike shows up.
- Full dictionary entry for "cas" with definition, IPA, and generated misspellings. Word entry
- Full dictionary entry for "ceo" - compare definitions side by side with the headword page. Word entry
- This pair ranks #210,031 of 323,831 scored Spanish confusable pairs in this corpus vintage. Corpus statistics
- "cas" and "ceo" also get mixed up with nearby pairs, the highest-scored neighbour is "cas vs cuc". Nearby pair
Confusion rank #210,031 of 323,831 scored Spanish pairs, corpus vintage 2026-09-03, not spelling advice.