cesvscoWhich spelling fits?

Quick tell: ces is a pronoun, co is a noun, so they fill different roles in a sentence.

Which to use

“ces” is a pronoun and “co” is a noun - they look or sound alike but fill different roles in a sentence.

#23,714
“ces” frequency rank
#2,386
“co” frequency rank
26100
confusion score

Side-by-Side Comparison

Feature ces co
Definition Estos. Chico, ese o tío.

Where the eye mixes ces and co

Muted = shared; highlighted = the visual trap. They share 1 letter in sequence.

3 ch
ces
2 ch
co

Look-alike desk: ces vs co

These two trip readers on the page rather than in the ear: ces is [se] while co is [ˈko]. 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 (pronoun vs noun), which is usually the fastest check. Our composite confusion score for this pair is 26100, derived from the frequency rank of both members and their visual similarity.

ces is recorded at frequency rank #23,714, classified as apron, pronounced [se]. co is at rank #2,386, tagged as anoun, pronounced [ˈko].

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 26100, this pair ranks #233,312 of 323,831 scored Spanish confusable pairs - roughly mid-pack for confusability.

Orthographic DNA of ces vs co

Shared letters: c. Private to "ces": es. Private to "co": o.

"ces" · 3 letters · shape CVC  ·  "co" · 2 letters · shape CV

Frequently Asked Questions

Is swapping "ces" for "co" ever safe?
No - they are not even the same part of speech. "ces" is a pronoun and "co" a noun, so a sentence built for one is usually ungrammatical with the other.
Which is more common, "ces" or "co"?
"co" is the more common of the two: it sits at frequency rank #2,386 in our Spanish list, against #23,714 for "ces". The two are close in frequency, so neither is a safe default; check the meaning rather than guessing.

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 "ces" with definition, IPA, and generated misspellings. Word entry
  • Full dictionary entry for "co" - compare definitions side by side with the headword page. Word entry
  • This pair ranks #233,312 of 323,831 scored Spanish confusable pairs in this corpus vintage. Corpus statistics
  • "ces" and "co" also get mixed up with nearby pairs, the highest-scored neighbour is "ces vs cuc". Nearby pair

Confusion rank #233,312 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