paraffin vs heptane

paraffin and heptane both are nouns.

Word	Noun	Adjective	Verb	Adverb
paraffin	Yes	No	No	No
heptane	Yes	No	No	No

As nouns, heptane is a hyponym of paraffin; that is, heptane is a word with a more specific, narrower meaning than paraffin:

paraffin: a series of non-aromatic saturated hydrocarbons with the general formula CnH(2n+2)
heptane: a colorless volatile highly flammable liquid obtained from petroleum and used as an anesthetic or a solvent or in determining octane ratings

Other hyponyms of paraffin include butane, amine, aminoalkane, C2H6, ethane, hexane, methane.

paraffin (noun)	heptane (noun)
from crude petroleum; used for candles and for preservative or waterproof coatings	a colorless volatile highly flammable liquid obtained from petroleum and used as an anesthetic or a solvent or in determining octane ratings
(British usage) kerosine
a series of non-aromatic saturated hydrocarbons with the general formula CnH(2n+2)