1. A supporter of extreme doctrines or procedure.

Nuttall's Standard dictionary of the English language By Nuttall, P.Austin

• extreamism,
• exstremis,
• extremest,
• exstremists,
• extremeism,
• exetremists,
• exstremist,
• extremesit,
• extremilty,
• extreamest,
• extreamists,
• extremisim,
• extrimist,
• exremists,
• extremests,
• extremelt,
• extrmist,
• extreemism,
• etremist,
• exstreamist

• extreme,
• extrude,
• extremely,
• extremum,
• exothermal,
• extremism,
• extremity,
• exothermic.

The adjective form of the word "extremist" is "extremist".

The plural of the "extremist" can be the "extremists".

The singular of the "extremist" can be the "extremist".