vinyl group vs vinyl

vinyl group and vinyl both are nouns.

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

As nouns, vinyl group and vinyl are synonyms defined as:

vinyl group and vinyl: a univalent chemical radical derived from ethylene

Other synonyms of vinyl group include vinyl radical.

vinyl group (noun)	vinyl (noun)
a univalent chemical radical derived from ethylene	a univalent chemical radical derived from ethylene
	shiny and tough and flexible plastic; used especially for floor coverings