white cedar vs Thuja occidentalis

white cedar and Thuja occidentalis both are nouns.

Word	Noun	Adjective	Verb	Adverb
white cedar	Yes	No	No	No
Thuja occidentalis	Yes	No	No	No

As nouns, white cedar and Thuja occidentalis are synonyms defined as:

white cedar and Thuja occidentalis: small evergreen of eastern North America having tiny scalelike leaves on flattened branchlets

Other synonyms of white cedar include American arborvitae, northern white cedar.

white cedar (noun)	Thuja occidentalis (noun)
slow-growing medium-sized cedar of east coast of the United States; resembles American arborvitae	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