Roget's Thesaurus

#323. Hardness

Nouns

hardness etc. adj.; rigidity; renitence, renitency; 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.

Verbs

render hard etc. adj.; harden, stiffen, indurate, petrify, temper, ossify, vitrify; accrust.

Adjectives

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 etc. n.; stiff as buckram, stiff as a poker; stiff as starch, stiff as as board.