wine steward vs server

wine steward and server both are nouns.

Word	Noun	Adjective	Verb	Adverb
wine steward	Yes	No	No	No
server	Yes	No	No	No

As nouns, server is a hypernym of wine steward; that is, server is a word with a broader meaning than wine steward:

Other hypernyms of wine steward include waiter.

wine steward (noun)	server (noun)
a waiter who manages wine service in a hotel or restaurant	utensil used in serving food or drink
	(computer science) a computer that provides client stations with access to files and printers as shared resources to a computer network
	a person whose occupation is to serve at table (as in a restaurant)
	(court games) the player who serves to start a point