Noun
1. communicator
2. hesitation
3. falter, faltering, pause, flutter
Verb
1. flicker, motion, movement, move, motility, hesitate
2. waffle, falter
3. hesitate, waffle, falter
4. move, fluctuate
5. vacillate, swing, flicker
6. flitter, flutter, quiver, move back and forth, weave
7. swing, sway, quaver
7. voice, sound, vocalize, vocalise