American dogwood vs red osier

American dogwood and red osier both are nouns.

Word	Noun	Adjective	Verb	Adverb
American dogwood	Yes	No	No	No
red osier	Yes	No	No	No

As nouns, American dogwood and red osier are synonyms defined as:

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

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

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