clade vs biological group

clade and biological group both are nouns.

Word	Noun	Adjective	Verb	Adverb
clade	Yes	No	No	No
biological group	Yes	No	No	No

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

clade: a group of biological taxa or species that share features inherited from a common ancestor
biological group: a group of plants or animals

clade (noun)	biological group (noun)
a group of biological taxa or species that share features inherited from a common ancestor	a group of plants or animals