sassing vs comeback

sassing and comeback both are nouns.

Word	Noun	Adjective	Verb	Adverb
sassing	Yes	No	No	No
comeback	Yes	No	No	No

As nouns, comeback is a hypernym of sassing; that is, comeback is a word with a broader meaning than sassing:

sassing: an impudent or insolent rejoinder
comeback: a quick reply to a question or remark (especially a witty or critical one)

Other hypernyms of sassing include counter, rejoinder, replication, retort, return, riposte.

sassing (noun)	comeback (noun)
an impudent or insolent rejoinder	return by a celebrity to some previously successful activity
	a quick reply to a question or remark (especially a witty or critical one)