Ustilaginoidea virens vs fungus

Ustilaginoidea virens and fungus both are nouns.

Word	Noun	Adjective	Verb	Adverb
Ustilaginoidea virens	Yes	No	No	No
fungus	Yes	No	No	No

As nouns, fungus is a hypernym of Ustilaginoidea virens; that is, fungus is a word with a broader meaning than Ustilaginoidea virens:

Ustilaginoidea virens: fungus causing green smut in rice
fungus: an organism of the kingdom Fungi lacking chlorophyll and feeding on organic matter; ranging from unicellular or multicellular organisms to spore-bearing syncytia

Ustilaginoidea virens (noun)	fungus (noun)
fungus causing green smut in rice	an organism of the kingdom Fungi lacking chlorophyll and feeding on organic matter; ranging from unicellular or multicellular organisms to spore-bearing syncytia