Abyss, Amputate, Arachnoid, Bisect, Breach, Break, Breakage, Broach, Burst, Bust, Butcher, Canyon, Carve, Cavity, Cerebellum, Cerebrum, Cessation, Chap, Chasm, Check, Chimney, Chink, Chip, Chop, Cleave, Cleft, Col, Convolution, Couloir, Prune, Ravine, Rent, Rift, Rime, Rip, Rupture, Saw, Scale, Schism, Scissor, Seam, Separate, Sever, Slash, Slice, Slit, Slot, Snap, Snip, Splinter, Split, Spread, Start, Suspension, Tap, Tear, Thalamus, Trench, Valley, Ventricle, Void, Wadi, Whittle, Crack, Cranny, Crevasse, Crevice, Cut, Defile, Dell, Disintegrate, Ditch, Divide, Donga, Draw, Excavation, Excise, Fault, Flaw, Forebrain, Fracture, Furrow, Gap, Gape, Gash, Gorge, Groove, Gulf, Gully, Hack, Halve, Hew, Hiatus, Hindbrain, Hippocampus, Hole, Hypothalamus, Incision, Interim, Intermission, Interruption, Interval, Jigsaw, Joint, Kloof, Lacuna, Lance, Leak, Lobe, Lull, Mantle, Moat, Notch, Open, Opening, Pare, Part, Pass, Passage, Pause