Which to use
“Cass” is a name and “cos” is a noun - they look or sound alike but fill different roles in a sentence.
- #14,714
- “Cass” frequency rank
- #6,553
- “cos” frequency rank
- 21267
- confusion score
Side-by-Side Comparison
| Feature | Cass | cos |
|---|---|---|
| Definition | A diminutive of the female given name Cassandra of medieval origin, later also used for Cassidy, and Catherine with its variant forms. | Synonym of romaine lettuce, a long-leaved variety of lettuce. |
Letter map: Cass vs cos
Shared letters muted; letters that set Cass and cos apart highlighted. Shared run: 2.
Role in the sentence - Cass and cos
Our dataset has no pronunciation recorded for both members, so the reliable separator here is grammatical: Cass is aname and cosanoun. On the page they differ by 1 letter(s) in length. Our composite confusion score for this pair is 21267, derived from the frequency rank of both members and their visual similarity.
Cass is recorded at frequency rank #14,714, classified as aname. cos is at rank #6,553, tagged as anoun, pronounced /kɑs/.
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 21267, this pair ranks #425,108 of 530,003 scored English confusable pairs - a relatively easy-to-tell-apart pair.
Orthographic DNA of Cass vs cos
Shared letters: cs. Private to "Cass": a. Private to "cos": o.
"Cass" · 4 letters · shape CVCC · "cos" · 3 letters · shape CVC
Known mistypes of this pair
- Cass ← acss · ccass · csas
Frequently Asked Questions
Do "Cass" and "cos" mean the same thing in a sentence?
Frequency check: "Cass" vs "cos" - which ranks higher?
Useful next steps
Done with this confusable. These links stay specific to "Cass" and "cos".
- Full dictionary entry for "Cass" 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 #425,108 of 530,003 scored English confusable pairs in this corpus vintage. Corpus statistics
- "Cass" and "cos" also get mixed up with nearby pairs, the highest-scored neighbour is "Cass vs CSX". 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 #425,108 of 530,003 scored English pairs, corpus vintage 2026-09-03, not spelling advice.