| insurgent(adjective, persistent, obstinate, insistent, dogged) |
| intractable(adjective, persistent, obstinate, insistent, dogged) |
| inveterate(adjective, persistent, obstinate, insistent, dogged) |
| invincible(adjective, persistent, obstinate, insistent, dogged) |
| iron(adjective, persistent, obstinate, insistent, dogged) |
| keen(adjective, passionate, enthusiastic, fervent, zealous) |
| keyed up(expression, adjective, excited, anxious, nervous) |
| mad(adjective, passionate, violent, fervent, rash) |
| magnetic |
| maladjusted |
| manic(adjective, anxious, disturbed, fearful, distraught) |
| megalomaniacal |
| mentally maladjusted(expression, adjective, anxious, disturbed, fearful) |
| mesmeric |
| mesmerizing |
| mutinous(adjective, persistent, obstinate, insistent, dogged) |
| nagging |
| nerd(noun, adjective, person) |
| nervous(adjective, excited, anxious, agitated, disturbed) |
| nervous wreck(expression, adjective, anxious, disturbed, fearful) |