palpitating Synonyms

palpitant beating tremulous tremulant tremble trembling thump thud throb twitching vibrating unsteady jumpy aquiver dithering fluttering pulsing twittery wobbling throbbing shuddering convulsive flutter palpitation pound pulsating pulsate pulse quaking quake quaky quavering quiver quivering shake shaking shaky shivering beat rapidly