Airspace, Antrum, Aperture, Area, Armpit, Asylum, Auger, Basement, Basin, Bearings, Bind, Bite, Blemish, Booth, Bore, Bowl, Box, Breach, Break, Brig, Broach, Broaching, Brothel, Bug, Bump, Bunker, Burrow, Cache, Cage, Canyon, Catch, Cave, Cavern, Cavity, Ceiling, Cell, Cellar, Chamber, Chap, Chasm, Check, Chimney, Chink, Clearing, Cleft, Col, Compartment, Concave, Concavity, Concealment, Corner, Couch, Couloir, Cove, Cover, Covert, Crack, Cranny, Crater, Crevasse, Crevice, Crib, Crosswind, Crypt, Cup, Cut, Deadlock, Deep, Defect, Defection, Deficiency, Defile, Dell, Den, Dent, Depression, Depth, Difficulty, Dilemma, Dip, Disclosure, Discontinuity, Discrepancy, Disrupt, District, Ditch, Dive, Mistake, Moat, Muddle, Needle, Niche, Nook, Notch, Open, Opening, Orifice, Outlet, Overcast, Pass, Passage, Passageway, Penetrate, Perforate, Perforation, Pew, Pickle, Pierce, Pigsty, Pinch, Pink, Pinpoint, Pit, Place, Placement, Playhouse, Plight, Pocket, Point, Pore, Position, Predicament, Prick, Prison, Problem, Punch, Puncture, Ravine, Ream, Recess, Refuge, Region, Rent, Retreat, Riddle, Rift, Rime, Rip, Rookery, Roughness, Run, Rupture, Sanctuary, Scoop, Score, Scrape, Seam, Sewer, Shack, Shaft, Shanty, Shell, Shortcoming, Sink, Sinus, Site, Situation, Skewer, Slam, Slit, Slot, Slum, Snag, Socket, Soup, Space, Spear, Spike, Spit, Split, Spot, Stab, Stable, Stalemate, Stall, Stand, Standstill, Stead, Stews, Stick, Stoma, Stop, Stratosphere, Strike, Sty, Babylon, Cat, Sodom, Abode, Abyss, Aerospace, Donga, Draw, Drawback, Drill, Dugout, Dump, Dungeon, Earth, Emplacement, Error, Excavation, Extremity, Failing, Failure, Fallacy, Fault, Fissure, Fistula, Fix, Flaw, Fleshpots, Fog, Foible, Fold, Follicle, Fontanel, Foramen, Form, Foxhole, Fracture, Frailty, Front, Furrow, Gap, Gape, Gash, Goal, Gore, Gorge, Gouge, Groove, Grotto, Gulf, Gully, Halt, Hiatus, Hideaway, Hideout, Hiding, Hit, Hold, Hollow, Honeycomb, Hovel, Hut, Impale, Impasse, Imperfection, Impression, Inadequacy, Incision, Inconsistency, Indentation, Infirmity, Inlet, Interval, Ionosphere, Jail, Joint, Keep, Kink, Kloof, Lacuna, Lair, Lance, Leak, Lieu, Locale, Locality, Location, Locus, Lodge, Loophole, Manger, Mess, Mew, Subway, Taint, Tap, Tear, Tenement, Touchdown, Trench, Tropopause, Troposphere, Trouble, Trough, Tunnel, Turbulence, Vacancy, Vacuity, Vacuum, Valley, Vault, Vent, Visibility, Void, Wadi, Warren, Weakness, Well, Whereabouts, Whorehouse, Yawn