Related by context. Frequent words. (Click for all words.) 51 duct 48 stairwell 48 ductwork 47 basement 45 passageway 44 roof 44 skylight 44 elevator shaft 44 doorway 43 attic 43 staircase 43 manhole 42 stairway 41 underground tunnels 41 cinder block 40 Plexiglas 40 drainage pipe 40 ceiling 40 sliding glass 40 radiator 40 cistern 40 ledge 40 crevice 40 breezeway 40 floorboards 39 vents 39 pipe 39 windshield 39 elevator 39 compartment 39 shaft 39 bathroom 39 propane tank 39 wire mesh 39 bedroom closet 38 engine compartment 38 passageways 38 pipes 38 refrigerator 38 cellar 38 ceiling tiles 38 barbed wire fence 38 hallway 38 grate 38 window 38 nozzle 38 ventilation 37 canister 37 carport 37 tunnels 37 upstairs bedroom 37 floorboard 37 canisters 37 chimney 37 walls 37 tunnel 37 upper floors 37 cavern 37 cavity 37 vestibule 37 stairs 37 flue 36 stairwells 36 manhole cover 36 cage 36 pried open 36 creek bed 36 furnace 36 spiral staircase 36 sheetrock 36 windowless 36 exhaust pipe 36 stove 36 bathtub 36 tubes 35 hose 35 garden hose 35 electrical wires 35 doorknob 35 wooden planks 35 dryer 35 plexiglass 35 bolt cutters 35 courtyard 35 State Penitentiary 35 sprinkler system 35 water heater 35 condenser 35 concrete slab 35 cylindrical 35 drainage ditch 35 exterior walls 35 screwdriver 35 storeroom 35 hacksaw 35 ducts 34 vat 34 culvert 34 wall 34 air conditioner 34 hoses