wild flower vs wilding

wild flower and wilding both are nouns.

Word	Noun	Adjective	Verb	Adverb
wild flower	Yes	No	No	No
wilding	Yes	No	No	No

As nouns, wilding is a hypernym of wild flower; that is, wilding is a word with a broader meaning than wild flower:

wild flower: wild or uncultivated flowering plant
wilding: a wild uncultivated plant (especially a wild apple or crabapple tree)

Other hypernyms of wild flower include angiosperm, flowering plant.

wild flower (noun)	wilding (noun)
wild or uncultivated flowering plant	an outrageous rampage usually involving sexual attacks by men on women
	a wild uncultivated plant (especially a wild apple or crabapple tree)