class Angiospermae vs flowering plant

class Angiospermae and flowering plant both are nouns.

Word	Noun	Adjective	Verb	Adverb
class Angiospermae	Yes	No	No	No
flowering plant	Yes	No	No	No

class Angiospermae (noun)	flowering plant (noun)
comprising flowering plants that produce seeds enclosed in an ovary; in some systems considered a class (Angiospermae) and in others a division (Magnoliophyta or Anthophyta)	plants having seeds in a closed ovary