Synonyms for Hamper (same or very similar meaning)
WordNet sense 1 (a restraint that confines or restricts freedom (especially something used to tie down or restrain a prisoner)):
bond, shackle, trammelWordNet sense 2 (put at a disadvantage):
handicap, hinder, hinderWordNet sense 3 (prevent the progress or free movement of):
cramp, halter, strangle, halterFrom the ODE community, based on WordNetadd/edit