A cataclysm is a violent, sudden event that causes great change and/or harm.
A catatonic person is in a state of suspended action; therefore, they are rigid, immobile, and unresponsive.
A catalyst is an agent that enacts change, such as speeding up a chemical reaction or causing an event to occur.
A catastrophe is a widespread terrible disaster that is often accompanied by many deaths.
A category is a class or group of similar things, such as books, fruit, or music.
make a catalogue, compile a catalogue
acceleration of a chemical reaction induced the presence of material that is chemically unchanged at the end of the reaction
change by catalysis or cause to catalyze
shoot forth or launch, as if from a catapult
an eye disease that involves the clouding or opacification of the natural lens of the eye
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