Chinese cinnamon vs bark

Chinese cinnamon and bark both are nouns.

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

As nouns, bark is a hypernym of Chinese cinnamon; that is, bark is a word with a broader meaning than Chinese cinnamon:

Chinese cinnamon: aromatic bark of the cassia-bark tree; less desirable as a spice than Ceylon cinnamon bark
bark: tough protective covering of the woody stems and roots of trees and other woody plants

Chinese cinnamon (noun)	bark (noun)
aromatic bark of the cassia-bark tree; less desirable as a spice than Ceylon cinnamon bark	a sailing ship with 3 (or more) masts
	the sound made by a dog
	a noise resembling the bark of a dog
	tough protective covering of the woody stems and roots of trees and other woody plants