eating house vs eatery

eating house and eatery both are nouns.

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

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

Other synonyms of eating house include eating place, restaurant.

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