#tower  a structure taller than its diameter; can stand alone or be attached to a larger building
  supertype:  #physical_structure__structure__construction  a thing constructed; a complex construction or entity; "the structure consisted of a series of arches"; "she wore her hair in an amazing construction of whirls and ribbons"
  subtype:  #barbican__barbacan  a tower that is part of a defensive structure (such as a castle)
  subtype:  #beacon_light__beacon__lighthouse__pharos  a tower with a light that gives warning of shoals to passing ships
  subtype:  #bell_tower  a tower that supports or shelters a bell
     subtype:  #campanile__belfry  a bell tower; usually stands alone unattached to a building
  subtype:  #church_tower  the tower of a church
  subtype:  #clock_tower__clocktower  a tower with a large clock high up on an outside face
  subtype:  #control_tower__controltower  a tower with an elevated workspace enclosed in glass for the visual observation of aircraft around an airport
  subtype:  #Eiffel_Tower  a wrought iron tower 300 meters high that was constructed for the Paris Exhibition of 1889; for many years it was the tallest man-made structure
  subtype:  #high-rise__tower_block__towerblock  tower consisting of a multistoried building of offices or apartments: "`tower block' is the British term for `high-rise'"
  subtype:  #minaret  slender tower with balconies
  subtype:  #mooring_tower__mooringtower__mooring_mast__mooringmast  a tower for mooring airships
  subtype:  #pylon  a large vertical steel tower supporting high-tension wires
  subtype:  #pylon.tower  a tower for guiding pilots or marking the turning point in a race
  subtype:  #shot_tower  tower of a kind once used to make shot; molten lead was poured through a sieve and dropped into water
  subtype:  #silo  a cylindrical tower used for storing silage
  subtype:  #steeple  a tall tower that forms the superstructure of a building (usually a church or temple) and that tapers to a point at the top
     subtype:  #pinnacle  (architecture) a slender upright spire at the top of a buttress of tower
  subtype:  #supporting_tower  a tower that serves to support something
     subtype:  #trestle  a supporting tower used to support a bridge
  subtype:  #turret  a small tower extending above a building
  subtype:  #watchtower  an observation tower for a lookout to watch over prisoners or watch for fires or enemies
     subtype:  #fire_tower  a watchtower where a lookout is posted to watch for fires

No statement uses or specializes #tower; click here to add one.