window-shop vs shop

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

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

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

Other hypernyms of window-shop include browse.

window-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

window-shop (verb)	shop (verb)
examine the shop windows; shop with the eyes only	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