buy vs shop

buy and shop both are nouns.

Word	Noun	Adjective	Verb	Adverb
buy	Yes	No	Yes	No
shop	Yes	No	Yes	No

buy (noun)	shop (noun)
an advantageous purchase	a course of instruction in a trade (as carpentry or electricity)
	a mercantile establishment for the retail sale of goods or services
	small workplace where handcrafts or manufacturing are done

buy (verb)	shop (verb)
accept as true	give away information about somebody
obtain by purchase; acquire by means of a financial transaction	do one's shopping
make illegal payments to in exchange for favors or influence	shop around; not necessarily buying
acquire by trade or sacrifice or exchange	do one's shopping at; do business with; be a customer or client of
be worth or be capable of buying