Oregon crab apple vs Malus fusca

Oregon crab apple and Malus fusca both are nouns.

Word	Noun	Adjective	Verb	Adverb
Oregon crab apple	Yes	No	No	No
Malus fusca	Yes	No	No	No

As nouns, Oregon crab apple and Malus fusca are synonyms defined as:

Oregon crab apple and Malus fusca: small tree or shrub of western United States having white blossoms and tiny yellow or red fruit

Oregon crab apple (noun)	Malus fusca (noun)
small tree or shrub of western United States having white blossoms and tiny yellow or red fruit	small tree or shrub of western United States having white blossoms and tiny yellow or red fruit