Drill, Drive, Dugout, Eldorado, Embattle, Entrench, Entrenchment, Eradicate, Evolve, Excavate, Excavation, Excise, Extract, Extricate, Fence, Font, Fortify, Fount, Fountain, Foxhole, Fund, Furrow, Gallery, Garrison, Gin, Gouge, Groove, Grow, Grub, Gulf, Harvest, Hoard, Honeycomb, Lode, Lower, Machine, Mainspring, Man, Milk, Mill, Moat, Mousetrap, Palisade, Pan, Parallel, Pit, Pitfall, Probe, Process, Prospect, Pull, Pump, Quarry, Raise, Ransack, Read, Rear, Refine, Remove, Repository, Reserve, Reservoir, Resource, Sabotage, Sap, Scan, Scoop, Scour, Scrabble, Scrape, Scratch, Search, Shaft, Eldorado, Abridge, Abundance, Abyss, Arm, Bank, Barricade, Battle, Bereave, Blast, Bleed, Blitz, Blockade, Bomb, Bombard, Bonanza, Bore, Bulwark, Bunker, Burrow, Carve, Chasm, Chisel, Colliery, Convert, Cornucopia, Cultivate, Curtail, Decoy, Deepen, Delve, Deposit, Depositary, Depository, Depress, Deprive, Derive, Dig, Diggings, Disentangle, Ditch, Dive, Divest, Drain, Draw, Dredge, Shovel, Sink, Smelt, Source, Spade, Spring, Staple, Store, Storehouse, Supply, Survey, Tap, Trap, Treasury, Trench, Trough, Tunnel, Undermine, Unearth, Unravel, Uproot, Vein, Wall, Wealth, Well, Wellhead, Withdraw, Work, Workings