amphibian family vs subphylum Craniata

amphibian family and subphylum Craniata both are nouns.

Word	Noun	Adjective	Verb	Adverb
amphibian family	Yes	No	No	No
subphylum Craniata	Yes	No	No	No

amphibian family (noun)	subphylum Craniata (noun)
any family of amphibians	fishes, amphibians, reptiles, birds, mammals