arouser vs arouse

arouser is a noun but arouse is not a noun.

Word	Noun	Adjective	Verb	Adverb
arouser	Yes	No	No	No
arouse	No	No	Yes	No

arouser (noun)	arouse (noun)
someone who rouses others from sleep

arouser (verb)	arouse (verb)
	cause to be alert and energetic
	cause to become awake or conscious
	stop sleeping
	summon into action or bring into existence, often as if by magic
	call forth (emotions, feelings, and responses)
	to evoke sexual feelings
	to begin moving