arouse vs arouser

arouse is not a noun while arouser is a noun.

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

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

arouse (verb)	arouser (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