methyl vs alkyl group

methyl and alkyl group both are nouns.

Word	Noun	Adjective	Verb	Adverb
methyl	Yes	No	No	No
alkyl group	Yes	No	No	No

As nouns, alkyl group is a hypernym of methyl; that is, alkyl group is a word with a broader meaning than methyl:

methyl: the univalent radical CH3- derived from methane
alkyl group: any of a series of univalent groups of the general formula CnH2n+1 derived from aliphatic hydrocarbons

Other hypernyms of methyl include alkyl, alkyl radical.

methyl (noun)	alkyl group (noun)
the univalent radical CH3- derived from methane	any of a series of univalent groups of the general formula CnH2n+1 derived from aliphatic hydrocarbons