stir vs invigorate

stir is a noun but invigorate is not a noun.

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

As verbs, invigorate is a hyponym of stir; that is, invigorate is a word with a more specific, narrower meaning than stir:

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

stir (verb)	invigorate (verb)
mix or add by stirring	impart vigor, strength, or vitality to
summon into action or bring into existence, often as if by magic	make lively
affect emotionally	give life or energy to
stir the feelings, emotions, or peace of	heighten or intensify
move very slightly
move an implement through
to begin moving
stir feelings in