sell someone out vs shop

sell someone out is not a noun while shop is a noun.

Word	Noun	Adjective	Verb	Adverb
sell someone out	No	No	Yes	No
shop	Yes	No	Yes	No

As verbs, shop is a hypernym of sell someone out; that is, shop is a word with a broader meaning than sell someone out:

Other hypernyms of sell someone out include betray, denounce, give away, grass, rat, shit, snitch, stag, tell on.

sell someone out (noun)	shop (noun)
	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

sell someone out (verb)	shop (verb)
give information that compromises others	give away information about somebody
	do one's shopping
	shop around; not necessarily buying
	do one's shopping at; do business with; be a customer or client of