Which to use
“cats” is a noun and “cos” is a pronoun - they look or sound alike but fill different roles in a sentence.
- #31,281
- “cats” frequency rank
- #27,810
- “cos” frequency rank
- 59091
- confusion score
Side-by-Side Comparison
| Feature | cats | cos |
|---|---|---|
| Definition | plural de cat | qualquer coisa |
Letter map: cats vs cos
Shared letters muted; letters that set cats and cos apart highlighted. Shared run: 2.
Grammar separator: cats vs cos
Our dataset has no pronunciation recorded for both members, so the reliable separator here is grammatical: cats is anoun and cosapronoun. On the page they differ by 1 letter(s) in length. Our composite confusion score for this pair is 59091, derived from the frequency rank of both members and their visual similarity.
cats is recorded at frequency rank #31,281, classified as anoun, pronounced /kæts/. 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 59091, this pair ranks #8,375 of 75,631 scored Portuguese confusable pairs - among the most confusable pairs.
Orthographic DNA of cats vs cos
Shared letters: cs. Private to "cats": at. Private to "cos": o.
"cats" · 4 letters · shape CVCC · "cos" · 3 letters · shape CVC
Known mistypes of this pair
- cats ← acts · catss · catts · ccats · ctas
Frequently Asked Questions
Do "cats" and "cos" mean the same thing in a sentence?
Frequency check: "cats" vs "cos" - which ranks higher?
Useful next steps
You've compared "cats" and "cos". Here's where to go from here.
- Full dictionary entry for "cats" 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 #8,375 of 75,631 scored Portuguese confusable pairs in this corpus vintage. Corpus statistics
- "cats" and "cos" also get mixed up with nearby pairs, the highest-scored neighbour is "cactus vs cats". Nearby pair
- Recorded mistypes exist for at least one side of this pair, useful when a spell-checker or OCR lands on the wrong form. See mistypes
Confusion rank #8,375 of 75,631 scored Portuguese pairs, corpus vintage 2026-09-03, not spelling advice.