trembling (n.)
- ague
- aspen
- bumpiness
- chattering
- chorea
- disquiet
- disquietude
- fidgetiness
- flutter
- heaving
- inquietude
- jactation
- jactitation
- jerkiness
- palpitation
- palsy
- panting
- pitter-patter
- quaver
- quiver
- quivering
- restlessness
- scary
- shaking
- shiver
- shivering
- shrinking
- shudder
- shy
- succussion
- throb
- throbbing
- timid
- tremble
- tremor
- trepidation
- trepidity
- unrest
- vibration
- wobbly
