amino group vs chemical group

amino group and chemical group both are nouns.

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

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

amino group: the radical -NH2
chemical group: (chemistry) two or more atoms bound together as a single unit and forming part of a molecule

Other hypernyms of amino group include group, radical.

amino group (noun)	chemical group (noun)
the radical -NH2	(chemistry) two or more atoms bound together as a single unit and forming part of a molecule