extremist
1. [ adjective ] (used of opinions and actions) far beyond the norm
Synonyms: radical ultra
Examples:

"extremist political views" "radical opinions on education" "an ultra conservative"

Related terms: immoderate
2. [ noun ] (politics) a person who holds extreme views
Related terms: radical
Similar spelling:   extremity
  extremism
  extremum
  extreme
  extremely
  exothermic
  exothermal
  extrude