- Fanatic
- Militant
- Radical
- Radical exit terms amended
- Ultra
- Zealot
- A supporter of extreme doctrines or practice; one who
holds extreme opinions.
- Radical (surgery)
- Spreading (weeds)
- Tending to intrude and take over
- Tending to spread, like weeds
- Tending to invade; characterized by invasion; aggressive.
- Agitate
- Fright
- Radical change
- Radical reorganisation
- New wave
- Radical (artist)