Roget's Thesaurus of English Words and Phrases by Peter Mark Roget

spinosity†. point, spike, spine, spicule [Biol.], 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 [U.S.], tine, yucca. nib, tooth, tusk; spoke, cog, ratchet. crag, crest, arete [Fr.], cone peak, sugar loaf, pike, aiguille†; spire, pyramid, steeple. beard, chevaux de frise [Fr.], 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 &c (arms) 727; bodkin &c (perforator) 262; belduque†, bowie knife†, paring knife; bushwhacker [U.S.]; drawing knife, drawing shave; microtome [Micro.]; chisel, screwdriver blade; flint blade; guillotine. sharpener, hone, strop; grindstone, whetstone; novaculite†; steel, emery. V. be sharp &c adj.; taper to a point; bristle with. render sharp &c adj.; sharpen, point, aculeate, whet, barb, spiculate†, set, strop, grind; chip (flint). cut &c (sunder) 44. Adj. 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 &c (rough) 256; snaggy, digitated†, two-edged, fusiform [Micro.]; 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 &c v.; set