class Heterokontae vs class Chrysophyceae

class Heterokontae and class Chrysophyceae both are nouns.

Word	Noun	Adjective	Verb	Adverb
class Heterokontae	Yes	No	No	No
class Chrysophyceae	Yes	No	No	No

As nouns, class Heterokontae and class Chrysophyceae are synonyms defined as:

class Heterokontae and class Chrysophyceae: all the yellow-green algae having flagella of unequal length

Other synonyms of class Heterokontae include Chrysophyceae, Heterokontae.

class Heterokontae (noun)	class Chrysophyceae (noun)
all the yellow-green algae having flagella of unequal length	all the yellow-green algae having flagella of unequal length