chromophore vs chemical group

chromophore and chemical group both are nouns.

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

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

chromophore: the chemical group that gives color to a molecule
chemical group: (chemistry) two or more atoms bound together as a single unit and forming part of a molecule

Other hypernyms of chromophore include group, radical.

chromophore (noun)	chemical group (noun)
the chemical group that gives color to a molecule	(chemistry) two or more atoms bound together as a single unit and forming part of a molecule