naphtha vs hydrocarbon

naphtha and hydrocarbon both are nouns.

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

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

naphtha: any of various volatile flammable liquid hydrocarbon mixtures; used chiefly as solvents
hydrocarbon: an organic compound containing only carbon and hydrogen

Other hypernyms of naphtha include dissolvent, dissolver, dissolving agent, resolvent, solvent.

naphtha (noun)	hydrocarbon (noun)
any of various volatile flammable liquid hydrocarbon mixtures; used chiefly as solvents	an organic compound containing only carbon and hydrogen