outlet vs retail store

outlet and retail store both are nouns.

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

As nouns, outlet and retail store are synonyms defined as:

Other synonyms of outlet include mercantile establishment, sales outlet.

outlet (noun)	retail store (noun)
activity that frees or expresses creative energy or emotion	a place of business for retailing goods
an opening that permits escape or release
a place of business for retailing goods
receptacle providing a place in a wiring system where current can be taken to run electrical devices