co vs cos, What's the Difference?

Which to use

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

#2,005
“co” frequency rank: #27,810
“cos” frequency rank: 29815
confusion score

Side-by-Side Comparison

Feature	co	cos
Definition	que	qualquer coisa

Letter map: co vs cos

Shared letters muted; letters that set co and cos apart highlighted. Shared run: 2.

2 ch

3 ch

cos

Corpus notes: co and cos

co and cos are indexed as a confusable Portuguese pair. We have no recorded pronunciation or part of speech for both members, so the spelling overlap is what we can show you: they differ by 1 extra letter(s) - “co” sits inside “cos”. Our composite confusion score for this pair is 29815, derived from the frequency rank of both members and their visual similarity.

co is recorded at frequency rank #2,005, classified as apron. cos is at rank #27,810, tagged as apron.

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 29815, this pair ranks #38,754 of 75,631 scored Portuguese 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 differ by 1 extra letter(s) - “co” sits inside “cos”, but the dictionary glosses above give them different meanings, so swapping one for the other changes what the sentence says.

Frequency check: "co" vs "cos" - which ranks higher?

"co" is the more common of the two: it sits at frequency rank #2,005 in our Portuguese list, against #27,810 for "cos". That is a wide gap, so in ordinary text the rarer spelling is the one worth double-checking.

After this comparison

Done with this confusable. These links stay specific to "co" and "cos".

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 #38,754 of 75,631 scored Portuguese confusable pairs in this corpus vintage. Corpus statistics
"co" and "cos" also get mixed up with nearby pairs, the highest-scored neighbour is "coin vs cos". Nearby pair

Confusion rank #38,754 of 75,631 scored Portuguese pairs, corpus vintage 2026-09-03, not spelling advice.