comeback vs rejoinder

comeback and rejoinder both are nouns.

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

As nouns, comeback and rejoinder are synonyms defined as:

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

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

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