ultrarightism

noun

ul·​tra·​right·​ism ˌəl-trə-ˈrīt-ˌi-zəm 

: advocacy of or adherence to extreme right-wing political policies and positions

ultrarightist

ˌəl-trə-ˈrī-tist 

noun

plural ultrarightists

a group of ultrarightists

ultrarightist adjective

ultrarightist party members

an ultrarightist rally/publication

Word History

First Known Use

1943, in the meaning defined above