candelilla vs slipper spurge

candelilla and slipper spurge both are nouns.

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

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

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

Other hypernyms of candelilla include slipper plant.

candelilla (noun)	slipper spurge (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