sharpen, v. [intensify], [aggravate], [quicken]; [hone], [grind], [point], whet.
sharpening stone. [whetstone], [hone], [oilstone], grindstone, abradant.
sharper, n. [trickster], swindler, [knave], [cheat], [extortioner], [blackleg].
sharpness, n. keenness, poignancy, acuity, acuteness, [edge]; asperity, [acrimony], impatience; [acumen], [sagacity], [shrewdness], astuteness, [aptness]; pungency, [piquancy].
sharp practice. [trickery], [chicanery].
sharp-sighted, a. eagle-eyed, acute, perspicacious, argus-eyed.
shatter, v. [shiver], [demolish]; [disorder], derange.
shave, n. shaving; spokeshave, drawshave.
sheath, n. [case], scabbard; [covering].
shed, v. [diffuse], emit, [radiate], [spread]; [cast], exuviate, [moult], [mew], discard; doff.