benzene vs aromatic hydrocarbon

benzene and aromatic hydrocarbon both are nouns.

Word	Noun	Adjective	Verb	Adverb
benzene	Yes	No	No	No
aromatic hydrocarbon	Yes	No	No	No

As nouns, aromatic hydrocarbon is a hypernym of benzene; that is, aromatic hydrocarbon is a word with a broader meaning than benzene:

benzene: a colorless liquid hydrocarbon; highly flammable; carcinogenic; the simplest of the aromatic compounds
aromatic hydrocarbon: a hydrocarbon that contains one or more benzene rings that are characteristic of the benzene series of organic compounds

benzene (noun)	aromatic hydrocarbon (noun)
a colorless liquid hydrocarbon; highly flammable; carcinogenic; the simplest of the aromatic compounds	a hydrocarbon that contains one or more benzene rings that are characteristic of the benzene series of organic compounds