Ulvophyceae vs class Ulvophyceae

Ulvophyceae and class Ulvophyceae both are nouns.

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

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

Ulvophyceae and class Ulvophyceae: alternative name for the class Chlorophyceae in some classifications

Ulvophyceae (noun)	class Ulvophyceae (noun)
alternative name for the class Chlorophyceae in some classifications	alternative name for the class Chlorophyceae in some classifications