stimulus vs stimulant

stimulus and stimulant both are nouns.

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

As nouns, stimulus and stimulant are synonyms defined as:

stimulus and stimulant: any stimulating information or event; acts to arouse action

Other synonyms of stimulus include input, stimulation.

stimulus (noun)	stimulant (noun)
any stimulating information or event; acts to arouse action	a drug that temporarily quickens some vital process
	any stimulating information or event; acts to arouse action

stimulus (adjective)	stimulant (adjective)
	that stimulates