eating house vs canteen

eating house and canteen both are nouns.

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

As nouns, canteen is a hyponym of eating house; that is, canteen is a word with a more specific, narrower meaning than eating house:

eating house (noun)	canteen (noun)
a building where people go to eat	a flask for carrying water; used by soldiers or travelers
	restaurant in a factory; where workers can eat
	a recreation room in an institution
	a restaurant outside; often for soldiers or policemen
	sells food and personal items to personnel at an institution or school or camp etc.