adulterate, ament, annul, auger, auricle, baffle, balk, bastardize, bayonet, bite, blast, block, bore, bramble, brave, brier, bristle, broach, bugger, bung, burr, cactus, cancel, capitulum, catchweed, catkin, challenge, check, check valve, checkmate, circumvent, cleavers, cob, cock, cone, confound, confront, contaminate, contravene, cork, corncob, corrupt, corymb, counter, counteract, countermand, countersink, counterwork, cripple, cross, cut, cyme, dagger, dash, de-energize, debase, debilitate, defeat, defy, denaturalize, denature, destroy, dilute, dirk, disable, disarm, discomfit, disconcert, discountenance, disenable, dish, disrupt, doctor, doctor up, drain, drill, drug, ear, ear of corn, elude, empierce, enfeeble, equipage, faucet, fix, flummox, foil, fortify, four-in-hand, frustrate, goose grass, gore, gouge, gouge out, hamstring, head, hole, honeycomb, hors de combat, impale, inactivate, incapacitate, kibosh, knife, knock the chocks, lace, lame, lance, lid, maim, mealie, nail, needle, nettle, nonplus, nullify, pair, panicle, peg, penetrate, perforate, perplex, picket, pierce, pike, pin, pine cone, pine needle, pink, plug, plunge in, poison, pollute, poniard, prick, prickle, prong, punch, puncture, put, queer, queer the works, quill, raceme, randem, ream, ream out, riddle, rig, ruin, run through, saber, sabotage, scotch, sea cock, skewer, spadix, span, spear, spicule, spiculum, spigot, spike
team, spikelet, spile, spill, spine, spit, spoil, stab, stake, stick, sticker, stiletto, stonewall, stop, stopgap, stopper, stopple, strengthen, strobile, stump, sword, tamper with, tandem, tap, team, thistle, thorn, three-up, thwart, thyrse, transfix, transpierce, treenail, trepan, trephine, turnout, umbel, unfit, unicorn, upset, valve, verticillaster, void, water, water down, weaken, wing, wreck, yucca
sharpness, acuity, acumination, spinosity, point, spike
, spine, spicule, spiculum, needle, hypodermic needle, tack, nail, pin, prick, prickle, spur, rowel, barb, spit, cusp, horn, antler, snag, tag thorn, bristle, Adam's needle, bear grass, tine, yucca, nib, tooth, tusk, spoke, cog, ratchet, crag, crest, arete, cone peak, sugar loaf, pike, aiguille, spire, pyramid, steeple, beard, chevaux de frise, porcupine, hedgehog, brier, bramble, thistle, comb, awn, beggar's lice, bur, burr, catchweed, cleavers, clivers, goose, grass, hairif, hariff, flax comb, hackle, hatchel, heckle, wedge, knife edge, cutting edge, blade, edge tool, cutlery, knife, penknife, whittle, razor, razor blade, safety razor, straight razor, electric razor, scalpel, bistoury, lancet, plowshare, coulter, colter, hatchet, ax, pickax, mattock, pick, adze, gill, billhook, cleaver, cutter, scythe, sickle, scissors, shears, pruning shears, cutters, wire cutters, nail clipper, paper cutter, sword, bodkin, belduque, bowie knife, paring knife, bushwhacker, drawing knife, drawing shave, microtome, chisel, screwdriver blade, flint blade, guillotine, sharpener, hone, strop, grindstone, whetstone, novaculite, steel, emery, sharp, keen, acute, acicular, aciform, aculeated, acuminated, pointed, tapering, conical, pyramidal, mucronate, mucronated, spindle shaped, needle shaped, spiked, spiky, ensiform, peaked, salient, cusped, cuspidate, cuspidated, cornute, cornuted, cornicultate, prickly, spiny, spinous, spicular, thorny, bristling, muricated, pectinated, studded, thistly, briary, craggy, snaggy, digitated, two-edged, fusiform, dentiform, denticulated, toothed, odontoid, starlike, stellated, stelliform, sagittate, sagittiform, arrowheaded, arrowy, barbed, spurred, acinaciform, apiculate, apiculated, aristate, awned, awny, bearded, calamiform, cone-shaped, coniform, crestate, echinate, gladiate, lanceolate, lanciform, awl, awl-shaped, lance-shaped, awl- shaped, scimitar-shaped, sword-shaped, setarious, spinuliferous, subulate, tetrahedral, xiphoid, cutting, sharp edged, knife edged, sharp as a razor, keen as a razor, sharp as a needle, sharp as a tack, sharpened, set.
open, ope, gape, yawn, bilge, fly open, perforate, pierce, empierce, tap, bore, drill, mine, tunnel, transpierce, transfix, enfilade, impale, spike
, spear, gore, spit, stab, pink, puncture, lance, stick, prick, riddle, punch, stave in, cut a passage through, make way for, make room for, uncover, unclose, unrip, lay open, cut open, rip open, throw open, pop open, blow open, pry open, tear open, pull open.
stopper, stopple, plug, cork, bung, spike
, spill, stopcock, tap, rammer, ram, ramrod, piston, stop-gap, wadding, stuffing, padding, stopping, dossil, pledget, tompion, tourniquet, cover, valve, vent peg, spigot, slide valve, janitor, doorkeeper, porter, warder, beadle, cerberus, ostiary.