wine steward vs wine waiter

wine steward and wine waiter both are nouns.

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

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

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

Other synonyms of wine steward include sommelier.

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