Breach, break, puncture, crack, wound, dent, pothole, passage, aperture, slit, slot, tunnel, channel, cavity, ravine, hollow, cliff, gorge, hole, hiatus, hinge, pipe, funnel, manhole, loophole, concavity, notching, dent, furrow, pit, scratch, trench, cave, burrow, deepening, mouth, cavity, receptacle, container, dwelling, cellar, cell, furnace
