devolvement vs relegating

devolvement and relegating both are nouns.

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

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

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

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

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