morning coat vs jacket

morning coat and jacket both are nouns.

Word	Noun	Adjective	Verb	Adverb
morning coat	Yes	No	No	No
jacket	Yes	No	Yes	No

As nouns, jacket is a hypernym of morning coat; that is, jacket is a word with a broader meaning than morning coat:

morning coat: a man's full-dress jacket with two long tapering tails at the back
jacket: a short coat

morning coat (noun)	jacket (noun)
a man's full-dress jacket with two long tapering tails at the back	a short coat
	an outer wrapping or casing
	(dentistry) dental appliance consisting of an artificial crown for a broken or decayed tooth
	the tough metal shell casing for certain kinds of ammunition
	the outer skin of a potato

morning coat (verb)	jacket (verb)
	put a jacket on
	provide with a thermally non-conducting cover