vinylbenzene vs phenylethylene

vinylbenzene and phenylethylene both are nouns.

Word	Noun	Adjective	Verb	Adverb
vinylbenzene	Yes	No	No	No
phenylethylene	Yes	No	No	No

As nouns, vinylbenzene and phenylethylene are synonyms defined as:

vinylbenzene and phenylethylene: a colorless oily liquid; the monomer for polystyrene

Other synonyms of vinylbenzene include cinnamene, styrene.

vinylbenzene (noun)	phenylethylene (noun)
a colorless oily liquid; the monomer for polystyrene	a colorless oily liquid; the monomer for polystyrene