Another word for harden
To make less pervious
steel, temper, anneal, solidify, mineralize, vitrify, precipitate, hornify, cornify, crystallize, freeze, amalgamate, coagulate, clot, granulate, make callous, make firm, make compact, make tight, make hard, convert to stone, congeal, ossify, petrify, starch, cure, bake, dry, flatten, cement, compact, consolidate, concentrate, sun, fire, fossilize, desiccate, braze, vulcanize, Harveyize, callous, incrassate, indurate, deposit, candy, toughen, fix, concrete, inspissate, encrust, lapidify; see also compress, press 1, stiffen 2, thicken 2.
To become less penetrable
solidify, congeal, jell, become dense, fix, settle, become fast, petrify, ossify, freeze over, fossilize, clot, cake, set, firm, curdle, coagulate, close, contract; see also freeze 1, stiffen 1, thicken 1.
acclimate, acclimatize, indurate, habituate, inure, season, make callous, make unfeeling, make obdurate, discipline, accustom, train, coarsen, roughen, sear, embitter, develop, strengthen, brutalize, render insensitive, render insensible, render unimpressible, blunt, dull, envenom, numb, stupefy, benumb, stun, paralyze, steel; see also deaden 1, stiffen 2, teach 2.
Another word for hardenverb
To make or become physically hard:cake, concrete, congeal, dry, indurate, petrify, set1, solidify. See solid
To make firmer in a particular conviction or habit:confirm, fortify, strengthen. See strong
To make resistant to hardship, especially through continued exposure:acclimate, acclimatize, caseharden, indurate, season, toughen. See continue, resist