service tree vs shadblow

service tree and shadblow both are nouns.

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

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

service tree and shadblow: 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, shadbush.

service tree (noun)	shadblow (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