cassia-bark tree vs Cinnamomum cassia

cassia-bark tree and Cinnamomum cassia both are nouns.

Word	Noun	Adjective	Verb	Adverb
cassia-bark tree	Yes	No	No	No
Cinnamomum cassia	Yes	No	No	No

As nouns, cassia-bark tree and Cinnamomum cassia are synonyms defined as:

cassia-bark tree and Cinnamomum cassia: Chinese tree with aromatic bark; yields a less desirable cinnamon than Ceylon cinnamon

Other synonyms of cassia-bark tree include cassia.

cassia-bark tree (noun)	Cinnamomum cassia (noun)
Chinese tree with aromatic bark; yields a less desirable cinnamon than Ceylon cinnamon	Chinese tree with aromatic bark; yields a less desirable cinnamon than Ceylon cinnamon