sorb apple vs service tree

sorb apple and service tree both are nouns.

Word	Noun	Adjective	Verb	Adverb
sorb apple	Yes	No	No	No
service tree	Yes	No	No	No

As nouns, sorb apple and service tree are synonyms defined as:

sorb apple and service tree: medium-sized European tree resembling the rowan but bearing edible fruit

Other synonyms of sorb apple include sorb apple tree, Sorbus domestica.

sorb apple (noun)	service tree (noun)
acid gritty-textured fruit	medium-sized European tree resembling the rowan but bearing edible 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