stimulus vs stimulate

stimulus is a noun but stimulate is not a noun.

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

stimulus (noun)	stimulate (noun)
any stimulating information or event; acts to arouse action

stimulus (verb)	stimulate (verb)
	cause to be alert and energetic
	act as a stimulant
	provide the needed stimulus for
	cause to do; cause to act in a specified manner
	cause to occur rapidly
	stir the feelings, emotions, or peace of
	stir feelings in