server vs restaurant attendant

server and restaurant attendant both are nouns.

Word	Noun	Adjective	Verb	Adverb
server	Yes	No	No	No
restaurant attendant	Yes	No	No	No

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

Other hypernyms of server include dining-room attendant.

server (noun)	restaurant attendant (noun)
utensil used in serving food or drink	someone employed to provide service in a dining room
(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