A place of protection
shelter, retreat, sanctuary, asylum, haven, safe haven, home, safe house, hiding place, ambush, cover, covert, coverture, sanctum, sanctum sanctorum, den, game preserve, nature preserve, bird sanctuary, harbor, harbor of refuge, anchorage, port, port in a storm, cloister, convent, monastery, ashram, hermitage, poorhouse, orphanage, safe place, fortress, stronghold, fallout shelter, storm cellar, hideaway*, hide-out*.