Urocystis cepulae vs onion smut

Urocystis cepulae and onion smut both are nouns.

Word	Noun	Adjective	Verb	Adverb
Urocystis cepulae	Yes	No	No	No
onion smut	Yes	No	No	No

As nouns, Urocystis cepulae and onion smut are synonyms defined as:

Urocystis cepulae and onion smut: smut fungus causing blackish blisters on scales and leaves of onions; especially destructive to seedlings

Urocystis cepulae (noun)	onion smut (noun)
smut fungus causing blackish blisters on scales and leaves of onions; especially destructive to seedlings	smut fungus causing blackish blisters on scales and leaves of onions; especially destructive to seedlings