spicebush vs California allspice

spicebush and California allspice both are nouns.

Word	Noun	Adjective	Verb	Adverb
spicebush	Yes	No	No	No
California allspice	Yes	No	No	No

As nouns, spicebush and California allspice are synonyms defined as:

spicebush and California allspice: straggling aromatic shrub of southwestern United States having fragrant brown flowers

Other synonyms of spicebush include Calycanthus occidentalis.

spicebush (noun)	California allspice (noun)
deciduous shrub of the eastern United States having highly aromatic leaves and bark and yellow flowers followed by scarlet or yellow berries	straggling aromatic shrub of southwestern United States having fragrant brown flowers
straggling aromatic shrub of southwestern United States having fragrant brown flowers