backtalk vs riposte

backtalk and riposte both are nouns.

Word	Noun	Adjective	Verb	Adverb
backtalk	Yes	No	No	No
riposte	Yes	No	Yes	No

As nouns, riposte is a hypernym of backtalk; that is, riposte is a word with a broader meaning than backtalk:

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

Other hypernyms of backtalk include comeback, counter, rejoinder, replication, retort, return.

backtalk (noun)	riposte (noun)
an impudent or insolent rejoinder	(fencing) a counterattack made immediately after successfully parrying the opponents lunge
	a quick reply to a question or remark (especially a witty or critical one)

backtalk (verb)	riposte (verb)
	answer back
	make a return thrust