service tree vs shadbush

service tree and shadbush both are nouns.

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

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

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

Other synonyms of service tree include Juneberry, serviceberry, shadblow.

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