phylum Coelenterata vs phylum

phylum Coelenterata and phylum both are nouns.

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

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

phylum Coelenterata: hydras, polyps, jellyfishes, sea anemones, corals
phylum: (biology) the major taxonomic group of animals and plants; contains classes

phylum Coelenterata (noun)	phylum (noun)
hydras, polyps, jellyfishes, sea anemones, corals	(biology) the major taxonomic group of animals and plants; contains classes
	(linguistics) a large group of languages that are historically related