shadbush vs service tree

shadbush and service tree both are nouns.

Word	Noun	Adjective	Verb	Adverb
shadbush	Yes	No	No	No
service tree	Yes	No	No	No

As nouns, shadbush and service tree are synonyms defined as:

shadbush and service tree: any of various North American trees or shrubs having showy white flowers and edible blue-black or purplish fruit

Other synonyms of shadbush include Juneberry, serviceberry, shadblow.

shadbush (noun)	service tree (noun)
any of various North American trees or shrubs having showy white flowers and edible blue-black or purplish fruit	medium-sized European tree resembling the rowan but bearing edible fruit
	any of various North American trees or shrubs having showy white flowers and edible blue-black or purplish fruit