shop vs inform

shop is a noun but inform is not a noun.

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

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

shop (noun)	inform (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

shop (verb)	inform (verb)
give away information about somebody	give character or essence to
do one's shopping	impart knowledge of some fact, state of affairs, or event to
shop around; not necessarily buying	act as an informer
do one's shopping at; do business with; be a customer or client of