sports jacket vs blazer

sports jacket and blazer both are nouns.

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

As nouns, sports jacket and blazer are synonyms defined as:

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

Other synonyms of sports jacket include sport coat, sport jacket, sports coat.

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