wild cinnamon vs shrub

wild cinnamon and shrub both are nouns.

Word	Noun	Adjective	Verb	Adverb
wild cinnamon	Yes	No	No	No
shrub	Yes	No	No	No

As nouns, shrub is a hypernym of wild cinnamon; that is, shrub is a word with a broader meaning than wild cinnamon:

wild cinnamon: large evergreen shrub or small tree having white aromatic bark and leathery leaves and small purple to red flowers in terminal cymes
shrub: a low woody perennial plant usually having several major stems

Other hypernyms of wild cinnamon include bush.

wild cinnamon (noun)	shrub (noun)
large evergreen shrub or small tree having white aromatic bark and leathery leaves and small purple to red flowers in terminal cymes	a low woody perennial plant usually having several major stems
West Indian tree; source of bay rum