alkane vs butane

alkane and butane both are nouns.

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

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

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

Other hyponyms of alkane include amine, aminoalkane, C2H6, ethane, heptane, hexane, methane.

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