Which to use
“caduco” is an adjective and “casco” is a noun - they look or sound alike but fill different roles in a sentence.
- #47,617
- “caduco” frequency rank
- #4,771
- “casco” frequency rank
- 52388
- confusion score
Side-by-Side Comparison
| Feature | caduco | casco |
|---|---|---|
| Definition | Decrépito, muy anciano. | Complemento rígido de protección para la cabeza. |
Where the eye mixes caduco and casco
Muted = shared; highlighted = the visual trap. They share 4 letters in sequence. caduco runs 6 letters (CVCVCV) against casco's 5 (CVCCV) - the length gap alone is often enough to separate them once you know to check it.
Visual trap between caduco and casco
These two trip readers on the page rather than in the ear: caduco is [kaˈð̞uko] while casco is [ˈkasko]. Spoken aloud the problem disappears. In writing it persists, because they differ by 1 letter(s) in length, and the parts of speech differ too (adjective vs noun), which is usually the fastest check. Our composite confusion score for this pair is 52388, derived from the frequency rank of both members and their visual similarity.
caduco is recorded at frequency rank #47,617, classified as anadj, pronounced [kaˈð̞uko]. casco is at rank #4,771, tagged as anoun, pronounced [ˈkasko].
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 52388, this pair ranks #92,955 of 323,831 scored Spanish confusable pairs - roughly mid-pack for confusability.
Orthographic DNA of caduco vs casco
Shared letters: aco. Private to "caduco": du. Private to "casco": s.
"caduco" · 6 letters · shape CVCVCV · "casco" · 5 letters · shape CVCCV
Known mistypes of this pair
Frequently Asked Questions
Do "caduco" and "casco" mean the same thing in a sentence?
Which is more common, "caduco" or "casco"?
Useful next steps
Visual near-miss handled. Browse the word pages or a neighbour when the next look-alike shows up.
- Full dictionary entry for "caduco" with definition, IPA, and generated misspellings. Word entry
- Full dictionary entry for "casco" - compare definitions side by side with the headword page. Word entry
- This pair ranks #92,955 of 323,831 scored Spanish confusable pairs in this corpus vintage. Corpus statistics
- "caduco" and "casco" also get mixed up with nearby pairs, the highest-scored neighbour is "caduco vs calco". 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 #92,955 of 323,831 scored Spanish pairs, corpus vintage 2026-09-03, not spelling advice.