Which to use
“cat” is a noun and “co” is a pronoun - they look or sound alike but fill different roles in a sentence.
- #7,740
- “cat” frequency rank
- #2,005
- “co” frequency rank
- 9745
- confusion score
Side-by-Side Comparison
| Feature | cat | co |
|---|---|---|
| Definition | gato (Felis catus) | que |
Letter map: cat vs co
Shared letters muted; letters that set cat and co apart highlighted. Shared run: 1.
Part-of-speech tell for cat / co
Our dataset has no pronunciation recorded for both members, so the reliable separator here is grammatical: cat is anoun and coapronoun. On the page they differ by 1 letter(s) in length. Our composite confusion score for this pair is 9745, derived from the frequency rank of both members and their visual similarity.
cat is recorded at frequency rank #7,740, classified as anoun, pronounced /kʰaʰt̪/. co is at rank #2,005, 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 9745, this pair ranks #63,572 of 75,631 scored Portuguese confusable pairs - a relatively easy-to-tell-apart pair.
Orthographic DNA of cat vs co
Shared letters: c. Private to "cat": at. Private to "co": o.
"cat" · 3 letters · shape CVC · "co" · 2 letters · shape CV
Frequently Asked Questions
Is swapping "cat" for "co" ever safe?
Which is more common, "cat" or "co"?
What to do next
Done with this confusable. These links stay specific to "cat" and "co".
- Full dictionary entry for "cat" 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 #63,572 of 75,631 scored Portuguese confusable pairs in this corpus vintage. Corpus statistics
- "cat" and "co" also get mixed up with nearby pairs, the highest-scored neighbour is "cat vs chau". Nearby pair
Confusion rank #63,572 of 75,631 scored Portuguese pairs, corpus vintage 2026-09-03, not spelling advice.