Embankment, Fence, Fender, File, Forceps, Fork, Frustrate, Fuse, Gate, Glazer, Goggles, Goose, Governor, Grader, Grapnel, Grindstone, Groin, Guard, Handrail, Harrow, Hawk, Helmet, Hook, Insulation, Interlock, Invalidate, Iron, Jack, Jam, Jetty, Lathe, Level, Lifeline, Logjam, Mangle, Mask, Mat, Midriff, Moat, Mole, Mound, Mudguard, Negate, Negative, Nullify, Offset, Pad, Padding, Palladium, Panel, Parapet, Partition, Patent, Pilot, Pincers, Pitchfork, Plane, Pliers, Polisher, Portcullis, Press, Preventive, Prophylactic, Puller, Punch, Aegis, Annul, Antacid, Antidote, Bank, Bar, Barrage, Barrier, Bevel, Bodkin, Boom, Bradawl, Breakwater, Buff, Bulkhead, Bulwark, Bumper, Calipers, Cancel, Chamois, Cofferdam, Contraceptive, Copyright, Counterbalance, Crowbar, Cushion, Dam, Dashboard, Diaphragm, Ditch, Dividers, Division, Dodger, Drag, Earthwork, Ram, Rammer, Rampart, Ramrod, Remedy, Roadblock, Roller, Safeguard, Safety, Sander, Screen, Screwdriver, Separation, Shaper, Shield, Spatula, Square, Stapler, Steamroller, Stultify, Tackle, Tamp, Tamper, Tap, Thwart, Tongs, Trowel, Tweezers, Umbrella, Undo, Vise, Vitiate, Void, Wall, Weir, Windscreen, Work, Wringer