Word Study
    quaking
CIDE DICTIONARY
quaking, a. & n. 
                                            THESAURUS
quaking
agitation, ague, aquiver, aspen, bumpiness, chattering, chills of fear, chorea, cold creeps, cold shivers, cold sweat, creeps, didder, disquiet, disquietude, dithers, fear and trembling, fidgetiness, fidgets, fits and starts, flutter, goose bumps, gooseflesh, heartquake, heaving, horripilation, inquietude, jactation, jactitation, jerkiness, jimjams, joltiness, nervousness, palpitation, palsied, palsy, panting, perturbation, pitapat, pitter-patter, quaver, quavering, quavery, quiver, quiver of terror, quivering, quivery, restlessness, shakes, shaking, shaky, shiver, shivering, shivers, shivery, shudder, shuddering, spasms, succussatory, succussion, succussive, sweat, thrill of fear, throb, throbbing, tremble, trembling, trembly, tremor, tremulant, tremulous, tremulousness, trepidation, trepidity, twitter, uneasiness, unrest, vibrating, vibration, wobbly
            For further exploring for "quaking" in Webster Dictionary Online
        

