cedar-apple rust vs apple rust

cedar-apple rust and apple rust both are nouns.

Word	Noun	Adjective	Verb	Adverb
cedar-apple rust	Yes	No	No	No
apple rust	Yes	No	No	No

As nouns, cedar-apple rust and apple rust are synonyms defined as:

cedar-apple rust and apple rust: rust fungus causing rust spots on apples and pears etc

Other synonyms of cedar-apple rust include Gymnosporangium juniperi-virginianae.

cedar-apple rust (noun)	apple rust (noun)
rust fungus causing rust spots on apples and pears etc	rust fungus causing rust spots on apples and pears etc