shop at vs back up

shop at and back up both are verbs.

Word	Noun	Adjective	Verb	Adverb
shop at	No	No	Yes	No
back up	No	No	Yes	No

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

Other hypernyms of shop at include support.

shop at (verb)	back up (verb)
do one's shopping at; do business with; be a customer or client of	establish as valid or genuine
	become or cause to become obstructed
	make a copy of (a computer file) especially for storage in another place as a security copy
	move backwards from a certain position
	give moral or psychological support, aid, or courage to