What part of speech is riposte?

Riposte can be categorized as a noun and a verb.

Parts of speech

1. riposte is a verb, present, 1st person singular of riposte (infinitive).
2. riposte is a verb (infinitive).
3. riposte is a noun, singular of ripostes.

Verb
riposte - make a return thrust; "his opponent riposted"
riposte - answer back
Noun
riposte - (fencing) a counterattack made immediately after successfully parrying the opponents lunge
riposte - a quick reply to a question or remark (especially a witty or critical one); "it brought a sharp rejoinder from the teacher"