mountain laurel vs calico bush

mountain laurel and calico bush both are nouns.

Word	Noun	Adjective	Verb	Adverb
mountain laurel	Yes	No	No	No
calico bush	Yes	No	No	No

As nouns, mountain laurel and calico bush are synonyms defined as:

mountain laurel and calico bush: a North American evergreen shrub having glossy leaves and white or rose-colored flowers

Other synonyms of mountain laurel include American laurel, Kalmia latifolia, wood laurel.

mountain laurel (noun)	calico bush (noun)
a North American evergreen shrub having glossy leaves and white or rose-colored flowers	a North American evergreen shrub having glossy leaves and white or rose-colored flowers
Pacific coast tree having aromatic foliage and small umbellate flowers followed by olivelike fruit; yields a hard tough wood