red osier vs redbrush

red osier and redbrush both are nouns.

Word	Noun	Adjective	Verb	Adverb
red osier	Yes	No	No	No
redbrush	Yes	No	No	No

As nouns, red osier and redbrush are synonyms defined as:

red osier and redbrush: common North American shrub with reddish purple twigs and white flowers

Other synonyms of red osier include American dogwood, Cornus stolonifera, red dogwood, red osier dogwood.

red osier (noun)	redbrush (noun)
Eurasian osier having reddish or purple twigs and bark rich in tannin	common North American shrub with reddish purple twigs and white flowers
common North American shrub with reddish purple twigs and white flowers