naphthalene vs hydrocarbon

naphthalene and hydrocarbon both are nouns.

Word	Noun	Adjective	Verb	Adverb
naphthalene	Yes	No	No	No
hydrocarbon	Yes	No	No	No

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

naphthalene: a white crystalline strong-smelling hydrocarbon made from coal tar or petroleum and used in organic synthesis and as a fumigant in mothballs
hydrocarbon: an organic compound containing only carbon and hydrogen

naphthalene (noun)	hydrocarbon (noun)
a white crystalline strong-smelling hydrocarbon made from coal tar or petroleum and used in organic synthesis and as a fumigant in mothballs	an organic compound containing only carbon and hydrogen