GRE

catastrophe - calamity

catechism - book for religious instruction; instruction by question and answer

categorical - without exceptions; unqualified; absolute :: absolute unqualified

catharsis - purging or cleansing of any passage of the body

cathartic - purgative

catholic - universal; wide-ranging liberal :: universal

caucus - private meeting of members of a party to select officers or determine policy

caulk - to make watertight (by plugging seams)

causal - implying a cause-and-effect relationship

caustic - burning; sarcastically biting

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