An extremist is someone who holds extreme views or takes extreme actions. The crossword solutions for this term include ENTHUSIAST, REVOLUTIONIST, BIGOT, REVOLUTIONARY, AGITATOR, RADICAL, FANATIC, ZEALOT, ULTRA, and outandouter. An ENTHUSIAST is someone who is very passionate about something. A REVOLUTIONIST is someone who advocates or participates in a revolution. A BIGOT is someone who is intolerant of those with different opinions. A REVOLUTIONARY is someone who advocates or participates in a revolution. An AGITATOR is someone who stirs up public opinion, often in an inflammatory way. A RADICAL is someone who advocates extreme measures or changes. A FANATIC is someone who is extremely devoted to a cause or idea. A ZEALOT is someone who is fanatically devoted to a cause or idea. An ULTRA is someone who is extreme in their views or actions. An outandouter is someone who is extreme in their views or actions.