cassia bark vs Chinese cinnamon

cassia bark and Chinese cinnamon both are nouns.

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

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

cassia bark and Chinese cinnamon: aromatic bark of the cassia-bark tree; less desirable as a spice than Ceylon cinnamon bark

cassia bark (noun)	Chinese cinnamon (noun)
aromatic bark of the cassia-bark tree; less desirable as a spice than Ceylon cinnamon bark	aromatic bark of the cassia-bark tree; less desirable as a spice than Ceylon cinnamon bark