noun (n)

• something immaterial that interferes with or delays action or progress(noun.cognition)

  Synonym:
  balk, baulk, check, deterrent, handicap, hinderance, impediment
  

  source: wordnet30
• any obstruction that impedes or is burdensome(noun.artifact)

  Synonym:
  encumbrance, hinderance, hitch, incumbrance, interference, preventative, preventive
  

  source: wordnet30
• the act of hindering or obstructing or impeding(noun.act)

  Synonym:
  hinderance, interference
  

  source: wordnet30
• The act of hindering, or the state of being hindered.(noun)

  source: webster1913