disparagement vs heckler

disparagement and heckler both are nouns.

Word	Noun	Adjective	Verb	Adverb
disparagement	Yes	No	No	No
heckler	Yes	No	No	No

disparagement (noun)	heckler (noun)
the act of speaking contemptuously of	someone who tries to embarrass you with gibes and questions and objections
a communication that belittles somebody or something