sponsor vs shop at

sponsor is a noun but shop at is not a noun.

Word	Noun	Adjective	Verb	Adverb
sponsor	Yes	No	Yes	No
shop at	No	No	Yes	No

As verbs, sponsor and shop at are synonyms defined as:

sponsor and shop at: do one's shopping at; do business with; be a customer or client of

Other synonyms of sponsor include buy at, frequent, patronise, patronize, shop.

sponsor (noun)	shop at (noun)
someone who supports or champions something
an advocate who presents a person (as for an award or a degree or an introduction etc.)

sponsor (verb)	shop at (verb)
assume sponsorship of	do one's shopping at; do business with; be a customer or client of
assume responsibility for or leadership of
do one's shopping at; do business with; be a customer or client of