inflexibility, temper, callosity, durity†.
induration, petrifaction; lapidification†, lapidescence†;
vitrification, ossification; crystallization.
stone, pebble, flint, marble, rock, fossil, crag, crystal, quartz,
granite, adamant; bone, cartilage; hardware; heart of oak, block,
board, deal board; iron, steel; cast iron, decarbonized iron, wrought
iron; nail; brick, concrete; cement.
V. render hard &c adj.; harden, stiffen, indurate, petrify, temper,
ossify, vitrify; accrust†.
Adj. hard, rigid, stubborn, stiff, firm; starch, starched; stark,
unbending, unlimber, unyielding; inflexible, tense; indurate,
indurated; gritty, proof.
adamant, adamantine, adamantean†; concrete, stony, granitic,
calculous, lithic†, vitreous; horny, corneous†; bony; osseous, ossific†;
cartilaginous; hard as a rock &c n.; stiff as buckram, stiff as a
poker; stiff as starch, stiff as as board.