watchtower Synonyms

lookout tower lookout post sign sentinel rocket picket pharos outlook observatory nightjar mirador loophole spial tower turret fire tower observation post observation tower lookout station lightship gazebo signal fire beacon light radar watch lookout loft conning tower cockloft bonfire belvedere beam beacon barbican balefire bailey attic alert derrick fanal lighthouse light lantern landmark lamp heliograph guidepost guard garret fort