caídovscioWhich spelling fits?

Quick tell: caído is a adjective, cio is a verb, so they fill different roles in a sentence.

Which to use

“caído” is an adjective and “cio” is a verb - they look or sound alike but fill different roles in a sentence.

#4,224
“caído” frequency rank
#41,792
“cio” frequency rank
46016
confusion score

Side-by-Side Comparison

Feature caído cio
Definition Desfallecido, amilanado. Tercera persona del singular (él, ella, ello; usted, 2.ª persona) del pretérito perfecto simple de indicativo de ciar.

Where the eye mixes caído and cio

Muted = shared; highlighted = the visual trap. They share 2 letters in sequence.

5 ch
caído
3 ch
cio

Look-alike desk: caído vs cio

These two trip readers on the page rather than in the ear: caído is [kaˈið̞o] while cio is [ˈsjo]. Spoken aloud the problem disappears. In writing it persists, because they differ by 2 letter(s) in length, and the parts of speech differ too (adjective vs verb), which is usually the fastest check. Our composite confusion score for this pair is 46016, derived from the frequency rank of both members and their visual similarity.

caído is recorded at frequency rank #4,224, classified as anadj, pronounced [kaˈið̞o]. cio is at rank #41,792, tagged as averb, pronounced [ˈsjo].

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 46016, this pair ranks #128,166 of 323,831 scored Spanish confusable pairs - roughly mid-pack for confusability.

Orthographic DNA of caído vs cio

Shared letters: co. Private to "caído": adí. Private to "cio": i.

"caído" · 5 letters · shape CVVCV  ·  "cio" · 3 letters · shape CVV

Frequently Asked Questions

Is swapping "caído" for "cio" ever safe?
No - they are not even the same part of speech. "caído" is an adjective and "cio" a verb, so a sentence built for one is usually ungrammatical with the other.
Frequency check: "caído" vs "cio" - which ranks higher?
"caído" is the more common of the two: it sits at frequency rank #4,224 in our Spanish list, against #41,792 for "cio". The two are close in frequency, so neither is a safe default; check the meaning rather than guessing.

Useful next steps

Eye-level mix-up between "caído" and "cio" is sorted above. Next: full entries or other pairs that share a letter shape.

  • Full dictionary entry for "caído" 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 #128,166 of 323,831 scored Spanish confusable pairs in this corpus vintage. Corpus statistics
  • "caído" and "cio" also get mixed up with nearby pairs, the highest-scored neighbour is "cio vs cuc". Nearby pair

Confusion rank #128,166 of 323,831 scored Spanish pairs, corpus vintage 2026-09-03, not spelling advice.

Source: Wiktionary (via kaikki.org) Structured Wiktionary extract

Source: FrequencyWords open word-frequency list