riposte vs back talk

riposte and back talk both are nouns.

Word	Noun	Adjective	Verb	Adverb
riposte	Yes	No	Yes	No
back talk	Yes	No	No	No

As nouns, back talk is a hyponym of riposte; that is, back talk is a word with a more specific, narrower meaning than riposte:

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

Other hyponyms of riposte include backtalk, lip, mouth, sass, sassing.

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

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