Philistine, adamant, adamantine, bankrupt, beat, beggared, bony, broke, busted, callous, calloused, case-hardened, cement, cemental, chilly, cold-blooded, cold, coldhearted, concrete, corneous, corrugated, cragged, craggy, crinkled, crumpled, crystal, crystalline, dense, destitute, diamondlike, dure, flat, flat broke, flintlike, flinty, fortuneless, frigid, granitelike, granitic, gravelly, gritty, hard-boiled, hard, hard as nails, hardened, hardhearted, harsh, heartless, horny, icy, impervious, implacable, indifferent, indigent, indurated, inflexible, insensible, insensitive, intractable, inured, iron-hard, ironbound, ironlike, jagged, jaggy, lapideous, lithoid, lithoidal, marble, marblelike, merciless, monolithic, needy, obdurate, oofless, osseous, pachydermatous, pebbled, pebbly, penniless, pitiless, poor, porphyritic, poverty-stricken, proof against, ragged, resistant, resistive, rock-ribbed, rock-strewn, rock-studded, rockbound, rocklike, rocky, rugged, rugose, rugous, sandy, saw-toothed, sawtooth, scragged, scraggly, scraggy, serrate, serrated, shingled, shingly, snagged, snaggled, snaggy, solid, steeled against, steellike, steely, stone-broke, stonelike, strapped, thick-skinned, tough, trachytic, uncompassionate, unfeeling, unresponsive, unsentimental, unsympathetic, wrinkled