instigant vs provoker

instigant and provoker both are nouns.

Word	Noun	Adjective	Verb	Adverb
instigant	Yes	No	No	No
provoker	Yes	No	No	No

As nouns, instigant and provoker are synonyms defined as:

Other synonyms of instigant include firebrand, inciter, instigator.

instigant (noun)	provoker (noun)
someone who deliberately foments trouble	someone who deliberately foments trouble