coyote bush vs coyote brush

coyote bush and coyote brush both are nouns.

Word	Noun	Adjective	Verb	Adverb
coyote bush	Yes	No	No	No
coyote brush	Yes	No	No	No

As nouns, coyote bush and coyote brush are synonyms defined as:

coyote bush and coyote brush: widely spreading evergreen shrub of southwestern United States with flower heads in a leafy panicle

Other synonyms of coyote bush include Baccharis pilularis, chaparral broom, kidney wort.

coyote bush (noun)	coyote brush (noun)
widely spreading evergreen shrub of southwestern United States with flower heads in a leafy panicle	widely spreading evergreen shrub of southwestern United States with flower heads in a leafy panicle