horse cassia vs cassia

horse cassia and cassia both are nouns.

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

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

horse cassia: tropical American semi-evergreen tree having erect racemes of pink or rose-colored flowers; used as an ornamental
cassia: any of various trees or shrubs of the genus Cassia having pinnately compound leaves and usually yellow flowers followed by long seedpods

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

horse cassia: East Indian tree having long pods containing a black cathartic pulp used as a horse medicine
cassia: any of various trees or shrubs of the genus Cassia having pinnately compound leaves and usually yellow flowers followed by long seedpods

horse cassia (noun)	cassia (noun)
tropical American semi-evergreen tree having erect racemes of pink or rose-colored flowers; used as an ornamental	any of various trees or shrubs of the genus Cassia having pinnately compound leaves and usually yellow flowers followed by long seedpods
East Indian tree having long pods containing a black cathartic pulp used as a horse medicine	Chinese tree with aromatic bark; yields a less desirable cinnamon than Ceylon cinnamon