cassia vs laurel

cassia and laurel both are nouns.

Word	Noun	Adjective	Verb	Adverb
cassia	Yes	No	No	No
laurel	Yes	No	No	No

As nouns, laurel is a hypernym of cassia; that is, laurel is a word with a broader meaning than cassia:

cassia: Chinese tree with aromatic bark; yields a less desirable cinnamon than Ceylon cinnamon
laurel: any of various aromatic trees of the laurel family

cassia (noun)	laurel (noun)
any of various trees or shrubs of the genus Cassia having pinnately compound leaves and usually yellow flowers followed by long seedpods	(antiquity) a wreath of laurel foliage worn on the head as an emblem of victory
Chinese tree with aromatic bark; yields a less desirable cinnamon than Ceylon cinnamon	any of various aromatic trees of the laurel family