slipper plant vs shrub

slipper plant and shrub both are nouns.

Word	Noun	Adjective	Verb	Adverb
slipper plant	Yes	No	No	No
shrub	Yes	No	No	No

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

slipper plant: any of several tropical American shrubby succulent plants resembling cacti but having foot-shaped bracts
shrub: a low woody perennial plant usually having several major stems

Other hypernyms of slipper plant include bush.

slipper plant (noun)	shrub (noun)
any of several tropical American shrubby succulent plants resembling cacti but having foot-shaped bracts	a low woody perennial plant usually having several major stems