| vibration(noun, beat, stroke, spark, evolution) |
| fluctuation(noun, action, act, movement, change) |
| vacillation(noun, change, delay, anxiety, weakness) |
| wavering(noun, action, act, movement, delay) |
| wave(noun, action, act, movement, sign) |
| quivering(noun, spark, sparkle, quiver, shudder) |
| swing(noun, action, act, movement, change) |
| beat(noun, stroke, occurrence, throb, regularity) |
| pulsation(noun, beat, occurrence, evolution, quiver) |
| undulation(noun, beat, stroke, evolution, throb) |
| alternation(noun, change, anxiety, weakness, uncertainty) |
| flutter(noun, beat, throb, rhythm, pulse) |
| rhythm(noun, beat, stroke, occurrence, throb) |
| cycle(noun, recurrence) |
| hesitancy(noun, trouble, concern, delay, anxiety) |
| pulse(noun, beat, evolution, quiver, shudder) |
| swinging(noun, fluctuation, swaying) |
| waving(noun, fluctuation, swaying, swinging) |
| faltering(noun, delay, anxiety, weakness, doubt) |
| frequency(noun, recurrence, commonness, repetitiveness) |