repartee vs witticism

repartee and witticism both are nouns.

Word	Noun	Adjective	Verb	Adverb
repartee	Yes	No	No	No
witticism	Yes	No	No	No

As nouns, witticism is a hypernym of repartee; that is, witticism is a word with a broader meaning than repartee:

repartee: adroitness and cleverness in reply
witticism: a message whose ingenuity or verbal skill or incongruity has the power to evoke laughter

Other hypernyms of repartee include humor, humour, wit, wittiness.

repartee (noun)	witticism (noun)
adroitness and cleverness in reply	a message whose ingenuity or verbal skill or incongruity has the power to evoke laughter