Chinese cinnamon vs cassia bark

Chinese cinnamon and cassia bark both are nouns.

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

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

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

Chinese cinnamon (noun)	cassia bark (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