cinnamon bark vs cinnamon

cinnamon bark and cinnamon both are nouns.

Word	Noun	Adjective	Verb	Adverb
cinnamon bark	Yes	No	No	No
cinnamon	Yes	No	No	No

As nouns, cinnamon bark and cinnamon are synonyms defined as:

cinnamon bark (noun)	cinnamon (noun)
aromatic bark used as a spice	spice from the dried aromatic bark of the Ceylon cinnamon tree; used as rolled strips or ground
aromatic bark of Saigon cinnamon used medicinally as a carminative	tropical Asian tree with aromatic yellowish-brown bark; source of the spice cinnamon
	aromatic bark used as a spice