white magic vs theurgy

white magic and theurgy both are nouns.

Word	Noun	Adjective	Verb	Adverb
white magic	Yes	No	No	No
theurgy	Yes	No	No	No

As nouns, theurgy is a hyponym of white magic; that is, theurgy is a word with a more specific, narrower meaning than white magic:

white magic: magic used only for good purposes
theurgy: white magic performed with the help of beneficent spirits (as formerly practiced by Neoplatonists)

white magic (noun)	theurgy (noun)
magic used only for good purposes	white magic performed with the help of beneficent spirits (as formerly practiced by Neoplatonists)
	the effect of supernatural or divine intervention in human affairs