thin as a rail (adjective) lank: thin
Sinonime: all skin and bones, angular,
attenuate, attenuated, beanpole, beanstalk, bony, cadaverous,
delicate,
emaciated,
ethereal, featherweight, fleshless,
fragile, gangling, gangly,
gaunt,
haggard,
lanky,
lean, lightweight,
meager,
narrow, peaked, pinched, pole, puny, rangy, rarefied, rawboned, reedy, rickety, scraggy, scrawny,
shadow, shriveled, skeletal,
skinny,
slender,
slight,
slim, slinky,
small,
spare, spindly, stalky,
starved,
stick*, stilt,
subtle, thin as a rail, threadlike, twiggy, twiglike, undernourished, underweight,
wan,
wasted*, weedy, wizened