Synonyms and related words :
Bolshevik, Jacobin, Wobbly, aficionado, anarchist, anarcho-syndicalist, buff, bug, crank, devotee, energumen, enthusiast, extreme left-winger, extremist, fan, fanatic, fanatico, freak, infatuate, left-wing extremist, mild radical, monomaniac, nihilist, nut, parlor Bolshevik, parlor pink, pink, pinko, radical, red, revolutionary, revolutionist, sans-culotte, subversive, syndicalist, ultra, ultraist, yippie, zealot