shopper vs shop

shopper and shop both are nouns.

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

shopper (noun)	shop (noun)
someone who visits stores in search of articles to buy	a course of instruction in a trade (as carpentry or electricity)
a commercial agent who shops at the competitor's store in order to compare their prices and merchandise with those of the store that employs her	a mercantile establishment for the retail sale of goods or services
	small workplace where handcrafts or manufacturing are done

shopper (verb)	shop (verb)
	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