咬む[kamu] to bite
鼠咬症[sokoushou] ratbite disease
不正咬合[fuseikougou] malocclusion
咬傷[koushou] a bite (wound)
咬み傷[kamikizu] bite (wound)

咬ます[kamasu] to force something into someone's mouth (i.e. a gag)
咬筋[koukin] masseter muscle
咬痙[koukei] lockjaw
咬創[kousou] biting wound
咬合面[kougoumen] masticating surface

痙る[tsuru] to cramp
痙攣[keiren] convulsion
胃痙攣[ikeiren] stomach cramps
書痙[shokei] writer's cramp
抗痙攣薬[koukeirenyaku] anticonvulsant

足が痙る[ashigatsuru] to have one's leg cramp
膣痙攣[chitsukeiren] vaginismus
咬痙[koukei] lockjaw
鎮痙薬[chinkeiyaku] antispasmodic drug
鎮痙剤[chinkeizai] antispasmodic drug