tea parlour vs restaurant

tea parlour and restaurant both are nouns.

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

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

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

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