frighten vs stir

frighten is not a noun while stir is a noun.

Word	Noun	Adjective	Verb	Adverb
frighten	No	No	Yes	No
stir	Yes	No	Yes	No

As verbs, stir is a hypernym of frighten; that is, stir is a word with a broader meaning than frighten:

Other hypernyms of frighten include excite, shake, shake up, stimulate.

frighten (noun)	stir (noun)
	a rapid active commotion
	emotional agitation and excitement
	a prominent or sensational but short-lived news event

frighten (verb)	stir (verb)
cause fear in	mix or add by stirring
	summon into action or bring into existence, often as if by magic
	affect emotionally
	stir the feelings, emotions, or peace of
	move very slightly
	move an implement through
	to begin moving
	stir feelings in