server vs waitress

server and waitress both are nouns.

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

As nouns, waitress is a hyponym of server; that is, waitress is a word with a more specific, narrower meaning than server:

Other hyponyms of server include carhop, counterperson, sommelier, wine steward, wine waiter.

server (noun)	waitress (noun)
utensil used in serving food or drink	a woman waiter
(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

server (verb)	waitress (verb)
	serve as a waiter or waitress in a restaurant