Bannister

• rail

  A barrier consisting of a horizontal bar and supports.

• bannister

  A railing at the side of a staircase or balcony to prevent people from falling.

Also contains

• fencing

  A barrier that serves to enclose an area.

• movable barrier

  A barrier that can be moved to allow passage.

• dam

  A barrier constructed to contain the flow of water or to keep out the sea.

• wing

  A barrier that surrounds the wheels of a vehicle to block splashing water or mud; "in Britain...

• grating

  A barrier that has parallel or crossed bars blocking a passage but admitting air.

• starting gate

  A movable barrier on the starting line of a race course.

• mole

  A protective structure of stone or concrete; extends from shore into the water to prevent a...

• hurdle

  A light movable barrier that competitors must leap over in certain races.

• revetment

  A barrier against explosives.

• barricade

  A barrier set up by police to stop traffic on a street or road in order to catch a fugitive...

• crash barrier

  A strong protective barrier that is erected around a racetrack or in the middle of...

• barricade

  A barrier (usually thrown up hastily) to impede the advance of an enemy; "they stormed...

• bulwark

  A fencelike structure around a deck (usually plural).