radical Synonyms

base fundamental primitive basal stem ultra revolutionary root group extremist theme original root word underground ultraist ideologue transcendentalist thoroughgoing thorough terrorist taproot underlying undermost utopist hothead forward-looking fundamentalist partizan chemical group activist all-embracing across the board meliorist prostatectomy underived zealot sweeping surd ruiner rioter revolutionist revolter revisory revisional renegade reformist reformer red recusant rebeller