cacodyl radical vs cacodyl group

cacodyl radical and cacodyl group both are nouns.

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

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

cacodyl radical and cacodyl group: the univalent group derived from arsine

Other synonyms of cacodyl radical include arsenic group, cacodyl.

cacodyl radical (noun)	cacodyl group (noun)
the univalent group derived from arsine	the univalent group derived from arsine