clepsydra/ʹklepsidrə/ noun (pl clepsydras clepsydrae /-dree/)

• coulomb
• Coulomb's law
• coulter
• coumarin
• coumarone
• Coun.
• council
• councillor
• councilman
• Council of Ministers
• councilor
• council tax
• counsel
• counsellor
• counsel of perfection
• counselor
• count
• count down
• countdown
• countenance
• counter
• counter-
• counteract
• counterattack
• counterattraction