alkyl vs methyl

alkyl and methyl both are nouns.

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

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

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

Other hyponyms of alkyl include ethyl, ethyl group, ethyl radical, methyl group, methyl radical.

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