Pyrenomycetes vs class Pyrenomycetes

Pyrenomycetes and class Pyrenomycetes both are nouns.

Word	Noun	Adjective	Verb	Adverb
Pyrenomycetes	Yes	No	No	No
class Pyrenomycetes	Yes	No	No	No

As nouns, Pyrenomycetes and class Pyrenomycetes are synonyms defined as:

Pyrenomycetes and class Pyrenomycetes: class of fungi in which the fruiting body is a perithecium; includes powdery mildews and ergot and Neurospora

Pyrenomycetes (noun)	class Pyrenomycetes (noun)
class of fungi in which the fruiting body is a perithecium; includes powdery mildews and ergot and Neurospora	class of fungi in which the fruiting body is a perithecium; includes powdery mildews and ergot and Neurospora