- coolOf a mildly low temperature.
- coalA black or brownish black rock formed from prehistoric plant remains, composed largely of carbon and burned as a fuel.
- coleCabbage.
- Colgatetoothpaste
- CowleyA hamlet in Holmesfield parish, North East Derbyshire district, Derbyshire (OS grid ref SK338770).
- ColburnA small town and civil parish with a town council in North Yorkshire, England, previously in Richmondshire district (OS grid ref SE2098).
- CoultonA village and civil parish (served by Gilling East with Cawton, Coulton and Grimston Parish Council) in North Yorkshire, England, previously in Ryedale district (OS grid ref SE634567).
- coomsoot, smut
- ColwichA village and civil parish in Stafford district, Staffordshire, England (OS grid ref SK0121).
- ColwickA suburban village and civil parish in Gedling borough, Nottinghamshire, England (OS grid ref SK6140).