eatery vs eating house

eatery and eating house both are nouns.

Word	Noun	Adjective	Verb	Adverb
eatery	Yes	No	No	No
eating house	Yes	No	No	No

As nouns, eatery and eating house are synonyms defined as:

Other synonyms of eatery include eating place, restaurant.

eatery (noun)	eating house (noun)
a building where people go to eat	a building where people go to eat