Craniata vs phylum

Craniata and phylum both are nouns.

Word	Noun	Adjective	Verb	Adverb
Craniata	Yes	No	No	No
phylum	Yes	No	No	No

As nouns, phylum is a hypernym of Craniata; that is, phylum is a word with a broader meaning than Craniata:

Craniata: fishes, amphibians, reptiles, birds, mammals
phylum: (biology) the major taxonomic group of animals and plants; contains classes

Craniata (noun)	phylum (noun)
fishes, amphibians, reptiles, birds, mammals	(biology) the major taxonomic group of animals and plants; contains classes
	(linguistics) a large group of languages that are historically related