naphtha vs dissolvent

naphtha and dissolvent both are nouns.

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

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

naphtha: any of various volatile flammable liquid hydrocarbon mixtures; used chiefly as solvents
dissolvent: a liquid substance capable of dissolving other substances

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

naphtha (noun)	dissolvent (noun)
any of various volatile flammable liquid hydrocarbon mixtures; used chiefly as solvents	a liquid substance capable of dissolving other substances