Cryptophyta vs phylum

Cryptophyta and phylum both are nouns.

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

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

Cryptophyta: a phylum in the kingdom Protoctista
phylum: (biology) the major taxonomic group of animals and plants; contains classes

Cryptophyta (noun)	phylum (noun)
a phylum in the kingdom Protoctista	(biology) the major taxonomic group of animals and plants; contains classes
	(linguistics) a large group of languages that are historically related