methane vs alkane series

methane and alkane series both are nouns.

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

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

methane: a colorless odorless gas used as a fuel
alkane series: a series of non-aromatic saturated hydrocarbons with the general formula CnH(2n+2)

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

methane (noun)	alkane series (noun)
a colorless odorless gas used as a fuel	a series of non-aromatic saturated hydrocarbons with the general formula CnH(2n+2)