mobile canteen vs canteen

mobile canteen and canteen both are nouns.

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

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

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

mobile canteen (noun)	canteen (noun)
a restaurant outside; often for soldiers or policemen	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.