Synonyms and related words :
bony, dilapidated, doddering, flat, flat-chested, fleshless, gangling, gangly, gaunt, gawky, groggy, lank, lanky, lean, lean-fleshed, lean-looking, meager, ramshackle, rangy, rawboned, ricketish, rickety, rocky, scraggy, scrawny, shaky, skeletal, skinny, spare, spidery, spindling, teetering, teetery, thin-bellied, thin-fleshed, tottering, tottery, tumbledown, twiggy, undersized, underweight, unsteady, wobbly