allyl radical vs chemical group

allyl radical and chemical group both are nouns.

Word	Noun	Adjective	Verb	Adverb
allyl radical	Yes	No	No	No
chemical group	Yes	No	No	No

As nouns, chemical group is a hypernym of allyl radical; that is, chemical group is a word with a broader meaning than allyl radical:

allyl radical: the univalent unsaturated organic radical C3H5; derived from propylene
chemical group: (chemistry) two or more atoms bound together as a single unit and forming part of a molecule

Other hypernyms of allyl radical include group, radical.

allyl radical (noun)	chemical group (noun)
the univalent unsaturated organic radical C3H5; derived from propylene	(chemistry) two or more atoms bound together as a single unit and forming part of a molecule