sudden contraction

SPASM
WordClue
TUGsudden powerful pull
BANGsudden percussive noise
GASPshort, sudden intake of breath
GRABsudden snatch at something
SLAMsudden impact or blow
HITCHsudden pull
LURCHsudden or unsteady movement
PANICsudden sensation of fear
PLUMPThe sound of a sudden heavy fall
SHOCKSudden, heavy impact
TREMORinvoluntary muscle contraction
WALKOUTsudden stoppage of work
DECREASEcontraction, wane
NURSINGsuckling, such as breastfeeding
SHOCKSudden, heavy impact