browse vs window-shop

browse is a noun but window-shop is not a noun.

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

As verbs, window-shop is a hyponym of browse; that is, window-shop is a word with a more specific, narrower meaning than browse:

Other hyponyms of browse include comparison-shop, antique.

browse (noun)	window-shop (noun)
the act of feeding by continual nibbling
reading superficially or at random
vegetation (such as young shoots, twigs, and leaves) that is suitable for animals to eat

browse (verb)	window-shop (verb)
eat lightly, try different dishes	examine the shop windows; shop with the eyes only
look around casually and randomly, without seeking anything in particular
feed as in a meadow or pasture
shop around; not necessarily buying