ordeal tree vs shrub

ordeal tree and shrub both are nouns.

Word	Noun	Adjective	Verb	Adverb
ordeal tree	Yes	No	No	No
shrub	Yes	No	No	No

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

Other hypernyms of ordeal tree include bush.

ordeal tree (noun)	shrub (noun)
evergreen shrub or tree of South Africa	a low woody perennial plant usually having several major stems