reinforcer vs stimulant

reinforcer and stimulant both are nouns.

Word	Noun	Adjective	Verb	Adverb
reinforcer	Yes	No	No	No
stimulant	Yes	Yes	No	No

As nouns, stimulant is a hypernym of reinforcer; that is, stimulant is a word with a broader meaning than reinforcer:

reinforcer: (psychology) a stimulus that strengthens or weakens the behavior that produced it
stimulant: any stimulating information or event; acts to arouse action

Other hypernyms of reinforcer include input, stimulation, stimulus.

reinforcer (noun)	stimulant (noun)
(psychology) a stimulus that strengthens or weakens the behavior that produced it	a drug that temporarily quickens some vital process
	any stimulating information or event; acts to arouse action

reinforcer (adjective)	stimulant (adjective)
	that stimulates