northern white cedar vs American arborvitae

northern white cedar and American arborvitae both are nouns.

Word	Noun	Adjective	Verb	Adverb
northern white cedar	Yes	No	No	No
American arborvitae	Yes	No	No	No

As nouns, northern white cedar and American arborvitae are synonyms defined as:

northern white cedar and American arborvitae: small evergreen of eastern North America having tiny scalelike leaves on flattened branchlets

Other synonyms of northern white cedar include Thuja occidentalis, white cedar.

northern white cedar (noun)	American arborvitae (noun)
small evergreen of eastern North America having tiny scalelike leaves on flattened branchlets	small evergreen of eastern North America having tiny scalelike leaves on flattened branchlets