sommelier vs server

sommelier and server both are nouns.

Word	Noun	Adjective	Verb	Adverb
sommelier	Yes	No	No	No
server	Yes	No	No	No

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

Other hypernyms of sommelier include waiter.

sommelier (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