Synonyms of hardens

1 Syllable
gird, steel, set, starch, clot, firm, bake, jell, fix, cake, dry, press
2 Syllables
stiffen, freeze, contract, buttress, curdle, temper, thicken, compact, toughen, cement, brace, strengthen, anneal, congeal, callous, close, settle, nerve
3 Syllables
vitrify, petrify, ossify, densify, fortify, reinforce, calcify
4 Syllables
crystallize, fossilize, indurate, solidify
5 Syllables
consolidate, coagulate, precipitate, amalgamate