respond vs riposte

respond is not a noun while riposte is a noun.

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

As verbs, riposte is a hyponym of respond; that is, riposte is a word with a more specific, narrower meaning than respond:

Other hyponyms of respond include call back, counter, field, sass, come back, rejoin, repay, retort, return, bridle.

respond (noun)	riposte (noun)
	(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)

respond (verb)	riposte (verb)
show a response or a reaction to something	answer back
respond favorably or as hoped	make a return thrust
react verbally