tea parlour vs eating house

tea parlour and eating house both are nouns.

Word	Noun	Adjective	Verb	Adverb
tea parlour	Yes	No	No	No
eating house	Yes	No	No	No

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

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

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