rejoinder vs comeback

rejoinder and comeback both are nouns.

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

As nouns, rejoinder and comeback are synonyms defined as:

rejoinder and comeback: a quick reply to a question or remark (especially a witty or critical one)

Other synonyms of rejoinder include counter, replication, retort, return, riposte.

rejoinder (noun)	comeback (noun)
a quick reply to a question or remark (especially a witty or critical one)	return by a celebrity to some previously successful activity
(law) a pleading made by a defendant in response to the plaintiff's replication	a quick reply to a question or remark (especially a witty or critical one)