Nouns

(n)rejoinder, retort, return, riposte, replication, comeback, countera quick reply to a question or remark (especially a witty or critical one)“it brought a sharp rejoinder from the teacher”
(n)riposte(fencing) a counterattack made immediately after successfully parrying the opponents lunge

Verbs

(v)ripostemake a return thrust“his opponent riposted”