wine waiter vs sommelier

wine waiter and sommelier both are nouns.

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

As nouns, wine waiter and sommelier are synonyms defined as:

wine waiter and sommelier: a waiter who manages wine service in a hotel or restaurant

Other synonyms of wine waiter include wine steward.

wine waiter (noun)	sommelier (noun)
a waiter who manages wine service in a hotel or restaurant	a waiter who manages wine service in a hotel or restaurant