phylum Nemertea vs phylum

phylum Nemertea and phylum both are nouns.

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

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

phylum Nemertea: proboscis worms
phylum: (biology) the major taxonomic group of animals and plants; contains classes

phylum Nemertea (noun)	phylum (noun)
proboscis worms	(biology) the major taxonomic group of animals and plants; contains classes
	(linguistics) a large group of languages that are historically related