Adamant, Serrated, Shaky, Sick, Snagged, Solid, Spidery, Spindly, Staunch, Steadfast, Steady, Steely, Stony, Sure, Teetering, Tottering, Tough, Treacherous, Tumbledown, Unbending, Uncaring, Uncertain, Unchanging, Uncomfortable, Unemotional, Unfeeling, Unflinching, Unhealthy, Unpredictable, Unreliable, Unsafe, Unsound, Unstable, Unsteady, Unsure, Unsympathetic, Untrustworthy, Unvarying, Unwavering, Unwell, Unyielding, Vacillating, Weak, Wobbling, Wobbly, Wrinkled, Ailing, Apathetic, Arduous, Bad, Bony, Bumpy, Callous, Cement, Certain, Cold, Concrete, Cool, Corrugated, Craggy, Crinkled, Crumpled, Crystal, Crystalline, Dense, Dependable, Detached, Determined, Difficult, Dilapidated, Doubtful, Down, Dubious, Emotionless, Faint, Firm, Flimsy, Flinty, Granitic, Gravelly, Gritty, Groggy, Hard, Hardhearted, Harsh, Horny, Ill, Impassive, Indifferent, Indisposed, Insecure, Invariable, Invariant, Jagged, Marble, Monolithic, Obdurate, Pebbled, Pebbly, Porphyritic, Questionable, Ragged, Ramshackle, Reliable, Resistant, Resistive, Resolute, Rickety, Rugged, Sandy, Sawtooth, Seedy, Serrate