Protozoa vs phylum

Protozoa and phylum both are nouns.

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

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

Protozoa: in some classifications considered a superphylum or a subkingdom; comprises flagellates, ciliates, sporozoans, amoebas, foraminifers
phylum: (biology) the major taxonomic group of animals and plants; contains classes

Protozoa (noun)	phylum (noun)
in some classifications considered a superphylum or a subkingdom; comprises flagellates, ciliates, sporozoans, amoebas, foraminifers	(biology) the major taxonomic group of animals and plants; contains classes
	(linguistics) a large group of languages that are historically related