cinnamon vs cinnamon bark

cinnamon and cinnamon bark both are nouns.

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

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

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