stir fry vs cookery

stir fry is not a noun while cookery is a noun.

Word	Noun	Adjective	Verb	Adverb
stir fry	No	No	Yes	No
cookery	Yes	No	No	No

stir fry (noun)	cookery (noun)
	the act of preparing something (as food) by the application of heat

stir fry (verb)	cookery (verb)
fry very quickly over high heat