Basidiomycetes vs subclass Homobasidiomycetes

Basidiomycetes and subclass Homobasidiomycetes both are nouns.

Word	Noun	Adjective	Verb	Adverb
Basidiomycetes	Yes	No	No	No
subclass Homobasidiomycetes	Yes	No	No	No

Basidiomycetes (noun)	subclass Homobasidiomycetes (noun)
large class of higher fungi coextensive with subdivision Basidiomycota	category used in some classification systems for various basidiomycetous fungi including e.g. mushrooms and puffballs which are usually placed in the classes Gasteromycetes and Hymenomycetes