shop vs shopper

shop and shopper both are nouns.

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

shop (noun)	shopper (noun)
a course of instruction in a trade (as carpentry or electricity)	someone who visits stores in search of articles to buy
a mercantile establishment for the retail sale of goods or services	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
small workplace where handcrafts or manufacturing are done

shop (verb)	shopper (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