| 激しい | The broadest word. Has the nuance of something that is aggressive and over-full of energy:weather, emotions, or even a place that is crazy packed and busy can be 激しい. $$$ |
| 極端 | Used about people – people who take things too far. A 2-foot-tall mohawk is 極端. |
| 過激 | Used about extreme politics only. |
KANJIDAMAGE