devolvement vs relegation

devolvement and relegation both are nouns.

Word	Noun	Adjective	Verb	Adverb
devolvement	Yes	No	No	No
relegation	Yes	No	No	No

As nouns, relegation is a hypernym of devolvement; that is, relegation is a word with a broader meaning than devolvement:

devolvement: the delegation of authority (especially from a central to a regional government)
relegation: authorizing subordinates to make certain decisions

Other hypernyms of devolvement include delegating, delegation, deputation, relegating.

devolvement (noun)	relegation (noun)
the delegation of authority (especially from a central to a regional government)	authorizing subordinates to make certain decisions
	mild banishment; consignment to an inferior position
	the act of assigning (someone or something) to a particular class or category