- cupA concave vessel for drinking, usually made of opaque material (as opposed to a glass) and with a handle.
- coopA basket, pen or enclosure for birds or small animals.
- cowlA monk's hood that can be pulled forward to cover the face; a robe with such a hood attached to it.
- cupolaA dome-shaped ornamental structure located on top of a larger roof or dome.
- kibbleTo grind coarsely.
- cupelA small circular receptacle used in assaying gold or silver with lead.
- keeveA bleaching vat; a kier.