mountain azalea vs alpine azalea

mountain azalea and alpine azalea both are nouns.

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

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

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

Other synonyms of mountain azalea include Loiseleuria procumbens.

mountain azalea (noun)	alpine 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