| Nut |
| Crank |
| Hound |
| Big fan |
| Devotee |
| Fanatic |
| Diehard |
| Firebrand |
| Extremist |
| Aficionado |
| Enthusiast |
| Young Turk |
| Extreme one |
| Serious fan |
| Diehard sort |
| Fervent sort |
| Gung-ho sort |
| Gung-ho type |
| Fanatical fan |
| Fanatical one |
| Overeager one |
| Wild-eyed one |
| Fanatical sort |
| Rabid partisan |
| Wild-eyed sort |
| Masada defender |
| Rabid adherent. |
| Ardent proponent |
| Enthusiast, plus |
| Ardent supporter |
| Over-eager beaver |
| Religious fanatic |
| Fan, and then some |
| Fanatical follower |
| Militant proponent |
| Extreme enthusiast |
| Fanatic for a cause |
| Fanatical supporter |
| Person with a cause |
| Fanatical enthusiast |
| Dyed-in-the-wool partisan |
| Fanatically committed one |
| Person militant about a cause |