service tree vs serviceberry

service tree and serviceberry both are nouns.

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

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

service tree and serviceberry: 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, shadblow, shadbush.

service tree (noun)	serviceberry (noun)
medium-sized European tree resembling the rowan but bearing edible fruit	edible purple or red berries
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