sport jacket vs sport coat

sport jacket and sport coat both are nouns.

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

As nouns, sport jacket and sport coat are synonyms defined as:

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

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

sport jacket (noun)	sport coat (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