blazer vs jacket

blazer and jacket both are nouns.

Word	Noun	Adjective	Verb	Adverb
blazer	Yes	No	No	No
jacket	Yes	No	Yes	No

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

blazer: lightweight single-breasted jacket; often striped in the colors of a club or school
jacket: a short coat

blazer (noun)	jacket (noun)
lightweight single-breasted jacket; often striped in the colors of a club or school	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

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