class Oomycetes vs family Plasmodiophoraceae

class Oomycetes and family Plasmodiophoraceae both are nouns.

Word	Noun	Adjective	Verb	Adverb
class Oomycetes	Yes	No	No	No
family Plasmodiophoraceae	Yes	No	No	No

class Oomycetes (noun)	family Plasmodiophoraceae (noun)
nonphotosynthetic fungi that resemble algae and that reproduce by forming oospores; sometimes classified as protoctists	family of fungi often causing hypertrophy in seed plants