vinyl group vs chemical group

vinyl group and chemical group both are nouns.

Word	Noun	Adjective	Verb	Adverb
vinyl group	Yes	No	No	No
chemical group	Yes	No	No	No

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

vinyl group: a univalent chemical radical derived from ethylene
chemical group: (chemistry) two or more atoms bound together as a single unit and forming part of a molecule

Other hypernyms of vinyl group include group, radical.

vinyl group (noun)	chemical group (noun)
a univalent chemical radical derived from ethylene	(chemistry) two or more atoms bound together as a single unit and forming part of a molecule