"retort" in the noun sense
1. rejoinder, retort, return, riposte, replication, comeback, counter
a quick reply to a question or remark (especially a witty or critical one
"it brought a sharp rejoinder from the teacher"
2. retort
a vessel where substances are distilled or decomposed by heat
"retort" in the verb sense
1. retort, come back, repay, return, riposte, rejoin
answer back
Source: WordNet® (An amazing lexical database of English)
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