methane series vs amine

methane series and amine both are nouns.

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

As nouns, amine is a hyponym of methane series; that is, amine is a word with a more specific, narrower meaning than methane series:

methane series: a series of non-aromatic saturated hydrocarbons with the general formula CnH(2n+2)
amine: a compound derived from ammonia by replacing hydrogen atoms by univalent hydrocarbon radicals

Other hyponyms of methane series include butane, aminoalkane, C2H6, ethane, heptane, hexane, methane.

methane series (noun)	amine (noun)
a series of non-aromatic saturated hydrocarbons with the general formula CnH(2n+2)	a compound derived from ammonia by replacing hydrogen atoms by univalent hydrocarbon radicals