The act or process of devolving; devolution.(noun)
Wiktionary.org : Text is available under the Creative Commons Attribution-ShareAlike License
Use "devolvement" in a sentence
"If there was a massive devolvement of power away from the centre, with Welsh, English and Northern Irish Parliaments (maybe a separate one for London too) then we could reduce the number of MPs (your idea of nothing sounds interesting)."
"Along with the rise of the regional parties there was also devolvement of power from the center to the state governments."
"Further, in new devolvement, the developers have to pay for the roads, sewers etc (except in high density urban renewal districts, where the rest of us end up subsidizing them.)"