canteen vs mobile canteen

canteen and mobile canteen both are nouns.

Word	Noun	Adjective	Verb	Adverb
canteen	Yes	No	No	No
mobile canteen	Yes	No	No	No

As nouns, canteen and mobile canteen are synonyms defined as:

canteen and mobile canteen: a restaurant outside; often for soldiers or policemen

canteen (noun)	mobile canteen (noun)
a flask for carrying water; used by soldiers or travelers	a restaurant outside; often for soldiers or policemen
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.