| knowing(adjective, understanding, keen, fine, sensible) |
| lively(adjective, energetic, excited, nervous, fickle) |
| mercurial(adjective, nervous, unstable, restless, unreliable) |
| miffy |
| moody(nervous, emotional, tense, restless, volatile) |
| nerve-racking(excited, anxious, pressure, shaky, tense) |
| nervous wreck |
| on pins and needles(expression, idiom, nervous, worried, uneasy) |
| on tenterhooks |
| ornery(adjective, energetic, passionate, lively, unstable) |
| overanxious(excited, anxious, pressure, shaky, tense) |
| overexcited(adjective, excited, tense, strained, stressed) |
| overzealous(nervous, emotional, restless, volatile, fiery) |
| peppy(adjective, energetic, excited, lively, fickle) |
| perceiving(adjective, understanding, keen, fine, sensible) |
| perceptive(adjective, understanding, keen, fine, sensible) |
| perturbable |
| precarious(adjective, understanding, keen, fine, sensible) |
| precise(adjective, understanding, keen, fine, sensible) |
| prickly |