butane vs alkane series

butane and alkane series both are nouns.

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

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

butane: occurs in natural gas; used in the manufacture of rubber and fuels
alkane series: a series of non-aromatic saturated hydrocarbons with the general formula CnH(2n+2)

Other hypernyms of butane include fuel, gas, alkane, methane series, paraffin, paraffin series.

butane (noun)	alkane series (noun)
occurs in natural gas; used in the manufacture of rubber and fuels	a series of non-aromatic saturated hydrocarbons with the general formula CnH(2n+2)