heptane vs alkane series

heptane and alkane series both are nouns.

Word	Noun	Adjective	Verb	Adverb
heptane	Yes	No	No	No
alkane series	Yes	No	No	No

As nouns, alkane series is a hypernym of heptane; that is, alkane series is a word with a broader meaning than heptane:

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

Other hypernyms of heptane include alkane, methane series, paraffin, paraffin series.

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