cinnamon vs Cinnamomum zeylanicum

cinnamon and Cinnamomum zeylanicum both are nouns.

Word	Noun	Adjective	Verb	Adverb
cinnamon	Yes	No	No	No
Cinnamomum zeylanicum	Yes	No	No	No

As nouns, cinnamon and Cinnamomum zeylanicum are synonyms defined as:

cinnamon and Cinnamomum zeylanicum: tropical Asian tree with aromatic yellowish-brown bark; source of the spice cinnamon

Other synonyms of cinnamon include Ceylon cinnamon, Ceylon cinnamon tree.

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