strawberry shrub vs strawberry bush

strawberry shrub and strawberry bush both are nouns.

Word	Noun	Adjective	Verb	Adverb
strawberry shrub	Yes	No	No	No
strawberry bush	Yes	No	No	No

As nouns, strawberry shrub and strawberry bush are synonyms defined as:

strawberry shrub and strawberry bush: hardy shrub of southeastern United States having clove-scented wood and fragrant red-brown flowers

Other synonyms of strawberry shrub include Calycanthus floridus, Carolina allspice, sweet shrub.

strawberry shrub (noun)	strawberry bush (noun)
hardy shrub of southeastern United States having clove-scented wood and fragrant red-brown flowers	upright deciduous plant with crimson pods and seeds; the eastern United States from New York to Florida and Texas
	hardy shrub of southeastern United States having clove-scented wood and fragrant red-brown flowers