Chordata vs phylum

Chordata and phylum both are nouns.

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

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

Chordata: comprises true vertebrates and animals having a notochord
phylum: (biology) the major taxonomic group of animals and plants; contains classes

Chordata (noun)	phylum (noun)
comprises true vertebrates and animals having a notochord	(biology) the major taxonomic group of animals and plants; contains classes
	(linguistics) a large group of languages that are historically related