phylum Annelida vs phylum

phylum Annelida and phylum both are nouns.

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

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

phylum Annelida: segmented worms: earthworms, lugworms, leeches
phylum: (biology) the major taxonomic group of animals and plants; contains classes

phylum Annelida (noun)	phylum (noun)
segmented worms: earthworms, lugworms, leeches	(biology) the major taxonomic group of animals and plants; contains classes
	(linguistics) a large group of languages that are historically related