class Basidiomycetes vs order Tremellales

class Basidiomycetes and order Tremellales both are nouns.

Word	Noun	Adjective	Verb	Adverb
class Basidiomycetes	Yes	No	No	No
order Tremellales	Yes	No	No	No

class Basidiomycetes (noun)	order Tremellales (noun)
large class of higher fungi coextensive with subdivision Basidiomycota	fungi varying from gelatinous to waxy or even horny in texture; most are saprophytic