arsenic group vs cacodyl group

arsenic group and cacodyl group both are nouns.

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

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

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

Other synonyms of arsenic group include cacodyl, cacodyl radical.

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