vinyl radical vs vinyl group

vinyl radical and vinyl group both are nouns.

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

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

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

Other synonyms of vinyl radical include vinyl.

vinyl radical (noun)	vinyl group (noun)
a univalent chemical radical derived from ethylene	a univalent chemical radical derived from ethylene