[noun] an urge to do or say something that might be better left undone or unsaid Synonyms:irresistible impulse
[noun] an irrational motive for performing trivial or repetitive actions against your will Synonyms:obsession
[noun] using force to cause something; "though pressed into rugby under compulsion I began to enjoy the game"; "they didn`t have to use coercion" Synonyms:coercion