alpine azalea vs mountain azalea

alpine azalea and mountain azalea both are nouns.

Word	Noun	Adjective	Verb	Adverb
alpine azalea	Yes	No	No	No
mountain azalea	Yes	No	No	No

As nouns, alpine azalea and mountain azalea are synonyms defined as:

alpine azalea and mountain azalea: creeping mat-forming evergreen shrub of high mountain regions of Northern Hemisphere grown for its rose-pink flowers

Other synonyms of alpine azalea include Loiseleuria procumbens.

alpine azalea (noun)	mountain azalea (noun)
creeping mat-forming evergreen shrub of high mountain regions of Northern Hemisphere grown for its rose-pink flowers	creeping mat-forming evergreen shrub of high mountain regions of Northern Hemisphere grown for its rose-pink flowers