subphylum Craniata vs fish family

subphylum Craniata and fish family both are nouns.

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

subphylum Craniata (noun)	fish family (noun)
fishes, amphibians, reptiles, birds, mammals	any of various families of fish