alderleaf Juneberry vs shadbush

alderleaf Juneberry and shadbush both are nouns.

Word	Noun	Adjective	Verb	Adverb
alderleaf Juneberry	Yes	No	No	No
shadbush	Yes	No	No	No

As nouns, shadbush is a hypernym of alderleaf Juneberry; that is, shadbush is a word with a broader meaning than alderleaf Juneberry:

alderleaf Juneberry: shrub or small tree of northwestern North America having fragrant creamy white flowers and small waxy purple-red fruits
shadbush: any of various North American trees or shrubs having showy white flowers and edible blue-black or purplish fruit

Other hypernyms of alderleaf Juneberry include Juneberry, service tree, serviceberry, shadblow.

alderleaf Juneberry (noun)	shadbush (noun)
shrub or small tree of northwestern North America having fragrant creamy white flowers and small waxy purple-red fruits	any of various North American trees or shrubs having showy white flowers and edible blue-black or purplish fruit