waiter vs wine waiter

waiter and wine waiter both are nouns.

Word	Noun	Adjective	Verb	Adverb
waiter	Yes	No	No	No
wine waiter	Yes	No	No	No

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

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

waiter (noun)	wine waiter (noun)
a person whose occupation is to serve at table (as in a restaurant)	a waiter who manages wine service in a hotel or restaurant
a person who waits or awaits