white cedar vs northern white cedar

white cedar and northern white cedar both are nouns.

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

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

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

Other synonyms of white cedar include American arborvitae, Thuja occidentalis.

white cedar (noun)	northern white cedar (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