cork jacket vs life vest

cork jacket and life vest both are nouns.

Word	Noun	Adjective	Verb	Adverb
cork jacket	Yes	No	No	No
life vest	Yes	No	No	No

As nouns, cork jacket and life vest are synonyms defined as:

cork jacket and life vest: life preserver consisting of a sleeveless jacket of buoyant or inflatable design

Other synonyms of cork jacket include life jacket.

cork jacket (noun)	life vest (noun)
life preserver consisting of a sleeveless jacket of buoyant or inflatable design	life preserver consisting of a sleeveless jacket of buoyant or inflatable design