Synonyms for Noose (same or very similar meaning)
WordNet sense 1 (a trap for birds or small mammals; often has a slip noose):
gin, snareWordNet sense 2 (a loop formed in a cord or rope by means of a slipknot; it binds tighter as the cord or rope is pulled):
running noose, slip nooseFrom the ODE community, based on WordNetadd/edit