WordWeb Online

1. Something that interferes with (or delays) action or progress
   - hindrance, hinderance, deterrent, balk, baulk [Brit], check, handicap
    
2. Any structure that makes progress difficult
   - obstruction, obstructor, obstructer, impedimenta

Derived forms: impediments

Type of: construction, difficultness, difficulty, fix [informal], hole [informal], jam [informal], kettle of fish [informal], mess [informal], muddle [informal], pickle [informal], structure

Encyclopedia: Impediment