covscosWhich spelling fits?

Which to use

“co” and “cos” are a confusable Spanish pair: similar on the page, but distinct in meaning, check the gloss before you choose.

#2,386
“co” frequency rank
#23,736
“cos” frequency rank
26122
confusion score

Side-by-Side Comparison

Feature co cos
Definition Chico, ese o tío. Cuerpo.

Where the eye mixes co and cos

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

2 ch
co
3 ch
cos

Visual trap between co and cos

A purely visual mix-up. co ([ˈko]) and cos ([ˈkos]) 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 extra letter(s) - “co” sits inside “cos”. Our composite confusion score for this pair is 26122, derived from the frequency rank of both members and their visual similarity.

co is recorded at frequency rank #2,386, classified as anoun, pronounced [ˈko]. cos is at rank #23,736, tagged as anoun, pronounced [ˈkos].

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 26122, this pair ranks #233,187 of 323,831 scored Spanish confusable pairs - roughly mid-pack for confusability.

Orthographic DNA of co vs cos

Shared letters: co. Private to "co": -. Private to "cos": s.

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

Frequently Asked Questions

Can "co" and "cos" be used interchangeably?
No. They are said differently ([ˈko] versus [ˈkos]) and carry different meanings; reading the sentence aloud is usually enough to catch the wrong one.
Frequency check: "co" vs "cos" - which ranks higher?
"co" is the more common of the two: it sits at frequency rank #2,386 in our Spanish list, against #23,736 for "cos". The two are close in frequency, so neither is a safe default; check the meaning rather than guessing.

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 "co" with definition, IPA, and generated misspellings. Word entry
  • Full dictionary entry for "cos" - compare definitions side by side with the headword page. Word entry
  • This pair ranks #233,187 of 323,831 scored Spanish confusable pairs in this corpus vintage. Corpus statistics
  • "co" and "cos" also get mixed up with nearby pairs, the highest-scored neighbour is "cos vs cuc". Nearby pair

Confusion rank #233,187 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