neoprene vs synthetic rubber

neoprene and synthetic rubber both are nouns.

Word	Noun	Adjective	Verb	Adverb
neoprene	Yes	No	No	No
synthetic rubber	Yes	No	No	No

As nouns, synthetic rubber is a hypernym of neoprene; that is, synthetic rubber is a word with a broader meaning than neoprene:

neoprene: a synthetic rubber that is resistant to oils and aging; used in waterproof products
synthetic rubber: any of various synthetic elastic materials whose properties resemble natural rubber

Other hypernyms of neoprene include rubber.

neoprene (noun)	synthetic rubber (noun)
a synthetic rubber that is resistant to oils and aging; used in waterproof products	any of various synthetic elastic materials whose properties resemble natural rubber