Nullify, Pair, Peg, Penetrate, Perforate, Perplex, Picket, Pierce, Pike, Pin, Pink, Plug, Poison, Pollute, Prick, Prickle, Prong, Punch, Puncture, Put, Queer, Quill, Ream, Riddle, Rig, Ruin, Saber, Sabotage, Scotch, Skewer, Span, Spear, Spigot, Spill, Spine, Spit, Spoil, Stab, Stake, Stick, Sticker, Stiletto, Stop, Stopgap, Stopper, Strengthen, Stump, Sword, Tandem, Tap, Team, Thistle, Thorn, Thwart, Turnout, Unfit, Unicorn, Upset, Valve, Void, Water, Weaken, Wing, Wreck, Adulterate, Annul, Auger, Baffle, Bayonet, Bite, Blast, Block, Bore, Bramble, Brave, Bristle, Broach, Bugger, Bung, Burr, Cactus, Cancel, Challenge, Check, Checkmate, Circumvent, Cleavers, Cob, Cock, Cone, Confound, Confront, Contaminate, Contravene, Cork, Corrupt, Counter, Counteract, Cripple, Cross, Cut, Dagger, Dash, Debase, Debilitate, Defeat, Defy, Destroy, Dilute, Disable, Disarm, Discomfit, Disconcert, Dish, Disrupt, Doctor, Drain, Drill, Drug, Ear, Elude, Enfeeble, Faucet, Fix, Foil, Fortify, Frustrate, Gore, Gouge, Hamstring, Head, Hole, Honeycomb, Impale, Incapacitate, Knife, Lace, Lame, Lance, Lid, Maim, Mealie, Nail, Needle, Nettle