As nouns the difference between powerist and powerism
is that powerist is a proponent of powerism while powerism is a disposition in geopolitical relations that supports hegemonic influence.
powerism
English
Noun
(-)
A disposition in geopolitical relations that supports hegemonic influence
References
*[https://www.google.ca/search?q=%22powerism%22&num=20&source=lnms&tbm=bks&sa=X&ei=_v5lVNW1D8H_aMrdgegG&ved=0CA0Q_AUoAA&biw=1366&bih=667]