vinyl group vs vinyl radical

vinyl group and vinyl radical both are nouns.

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

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

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

Other synonyms of vinyl group include vinyl.

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