vinyl vs chemical group

vinyl and chemical group both are nouns.

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

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

vinyl: 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 include group, radical.

vinyl (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
shiny and tough and flexible plastic; used especially for floor coverings