apple rust vs Gymnosporangium juniperi-virginianae

apple rust and Gymnosporangium juniperi-virginianae both are nouns.

Word	Noun	Adjective	Verb	Adverb
apple rust	Yes	No	No	No
Gymnosporangium juniperi-virginianae	Yes	No	No	No

As nouns, apple rust and Gymnosporangium juniperi-virginianae are synonyms defined as:

apple rust and Gymnosporangium juniperi-virginianae: rust fungus causing rust spots on apples and pears etc

Other synonyms of apple rust include cedar-apple rust.

apple rust (noun)	Gymnosporangium juniperi-virginianae (noun)
rust fungus causing rust spots on apples and pears etc	rust fungus causing rust spots on apples and pears etc