noun

painful involuntary contraction of a muscle or muscles, typically caused by fatigue or strain.

an attack of cramp

muscle/muscular spasm,muscle/muscular contraction,pang,twinge,crick,kink,stitch,stiffness,pain,shooting pain,ache,convulsion,tic,twitch,clonus,hyperkinesis

verb

inhibit the development of.

tighter rules will cramp economic growth

hinder,impede,inhibit,hamper,constrain,hamstring,obstruct,block,thwart,slow,check,arrest,curb,bridle,shackle,encumber,retard,handicap,tie,interfere with,restrict,limit,confine,restrain,set/impose limits on,regulate,control,moderate,cut down on,stymie