Ray·leigh 
(rālē), Third Baron. Title of John William Strutt. 1842-1919.
(rālē), Third Baron. Title of John William Strutt. 1842-1919. British physicist. He won a 1904 Nobel Prize for investigating the density of gases and for discovering argon with Sir William Ramsay.
- casserole
- cassette
- cassette deck
- cassia
- cassimere
- cassina
- Cassini
- Cassini division
- cassino
- Cassino
- Cassiodorus
- Cassiopeia
- cassis
- cassiterite
- Cassius Longinus
- Cassius Marcellus
- Cassius Marcellus Clay, Jr.
- Cassius Marcellus, Jr.
- cassock
- cassone
- cassoulet
- cassowary
- cast
- cast about
- cast about (or around)