ci vs cos, What's the Difference?

Which to use

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

#19,655
“ci” frequency rank: #27,810
“cos” frequency rank: 47465
confusion score

Side-by-Side Comparison

Feature	ci	cos
Definition	tu, pronome pessoal sujeito da segunda pessoa do singular:	qualquer coisa

Letter map: ci vs cos

Shared letters muted; letters that set ci and cos apart highlighted. Shared run: 1.

2 ch

3 ch

cos

Corpus notes: ci and cos

ci 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 letter(s) in length. Our composite confusion score for this pair is 47465, derived from the frequency rank of both members and their visual similarity.

ci is recorded at frequency rank #19,655, classified as apron, pronounced /tsi/. 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 47465, this pair ranks #17,783 of 75,631 scored Portuguese confusable pairs - among the most confusable pairs.

Orthographic DNA of ci vs cos

Shared letters: c. Private to "ci": i. Private to "cos": os.

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

Frequently Asked Questions

Do "ci" and "cos" mean the same thing in a sentence?

No. They differ by 1 letter(s) in length, but the dictionary glosses above give them different meanings, so swapping one for the other changes what the sentence says.

Which is more common, "ci" or "cos"?

"ci" is the more common of the two: it sits at frequency rank #19,655 in our Portuguese list, against #27,810 for "cos". The two are close in frequency, so neither is a safe default; check the meaning rather than guessing.

After this comparison

You've compared "ci" and "cos". Here's where to go from here.

Full dictionary entry for "ci" 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 #17,783 of 75,631 scored Portuguese confusable pairs in this corpus vintage. Corpus statistics
"ci" and "cos" also get mixed up with nearby pairs, the highest-scored neighbour is "coin vs cos". Nearby pair

Confusion rank #17,783 of 75,631 scored Portuguese pairs, corpus vintage 2026-09-03, not spelling advice.