cyanide group vs chemical group

cyanide group and chemical group both are nouns.

Word	Noun	Adjective	Verb	Adverb
cyanide group	Yes	No	No	No
chemical group	Yes	No	No	No

As nouns, chemical group is a hypernym of cyanide group; that is, chemical group is a word with a broader meaning than cyanide group:

cyanide group: the monovalent group -CN in a chemical compound
chemical group: (chemistry) two or more atoms bound together as a single unit and forming part of a molecule

Other hypernyms of cyanide group include group, radical.

cyanide group (noun)	chemical group (noun)
the monovalent group -CN in a chemical compound	(chemistry) two or more atoms bound together as a single unit and forming part of a molecule