comparison-shop vs shop

comparison-shop is not a noun while shop is a noun.

Word	Noun	Adjective	Verb	Adverb
comparison-shop	No	No	Yes	No
shop	Yes	No	Yes	No

As verbs, shop is a hypernym of comparison-shop; that is, shop is a word with a broader meaning than comparison-shop:

Other hypernyms of comparison-shop include browse.

comparison-shop (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

comparison-shop (verb)	shop (verb)
compare prices for a given item	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