candelilla vs slipper plant

candelilla and slipper plant both are nouns.

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

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

candelilla: wax-coated Mexican shrub related to Euphorbia antisyphilitica
slipper plant: any of several tropical American shrubby succulent plants resembling cacti but having foot-shaped bracts

Other hypernyms of candelilla include slipper spurge.

candelilla (noun)	slipper plant (noun)
wax-coated shrub of northern Mexico and southwestern United States	any of several tropical American shrubby succulent plants resembling cacti but having foot-shaped bracts
wax-coated Mexican shrub related to Euphorbia antisyphilitica