store vs retail store

store and retail store both are nouns.

Word	Noun	Adjective	Verb	Adverb
store	Yes	No	Yes	No
retail store	Yes	No	No	No

As nouns, retail store is a hypernym of store; that is, retail store is a word with a broader meaning than store:

Other hypernyms of store include mercantile establishment, outlet, sales outlet.

store (noun)	retail store (noun)
a mercantile establishment for the retail sale of goods or services	a place of business for retailing goods
a depository for goods
an electronic memory device
a supply of something available for future use

store (verb)	retail store (verb)
keep or lay aside for future use
find a place for and put away for storage