| swing set(noun, swing, fluctuate, toy) |
| teeter(noun, unstable, unsteady, vibrate) |
| teeter-totter(noun, swing, fluctuate, toy) |
| teeterboard(noun, swing, fluctuate, toy) |
| teetering-board(noun, swing, fluctuate, toy) |
| teetering board(noun, swing, fluctuate, toy) |
| thrill(noun, unstable, unsteady, vibrate) |
| ticker(noun, thing, equipment, apparatus) |
| tilt(noun, swing, fluctuate, toy) |
| to-and-fro(noun, unstable, unsteady, vibrate) |
| totter(noun, unstable, unsteady, vibrate) |
| vacillation(noun, unstable, unsteady, vibrate) |
| variance(noun, unstable, unsteady, vibrate) |
| variation(noun, unstable, unsteady, vibrate) |
| vibration(noun, unstable, unsteady, vibrate) |
| wabble(noun, unstable, unsteady, vibrate) |
| waffle(verb, unstable, fluctuate, unsteady) |
| wave(noun, unstable, unsteady, vibrate) |
| willy-nilly(noun, unstable, unsteady, vibrate) |
| wobble(noun, unstable, unsteady, vibrate) |