trading post vs retail store

trading post and retail store both are nouns.

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

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

trading post: a retail store serving a sparsely populated region; usually stocked with a wide variety of merchandise
retail store: a place of business for retailing goods

Other hypernyms of trading post include mercantile establishment, outlet, sales outlet.

trading post (noun)	retail store (noun)
a retail store serving a sparsely populated region; usually stocked with a wide variety of merchandise	a place of business for retailing goods