#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

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