tea parlor vs restaurant

tea parlor and restaurant both are nouns.

Word	Noun	Adjective	Verb	Adverb
tea parlor	Yes	No	No	No
restaurant	Yes	No	No	No

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

Other hypernyms of tea parlor include eatery, eating house, eating place.

tea parlor (noun)	restaurant (noun)
a restaurant where tea and light meals are available	a building where people go to eat