Synonyms of harden

1 Syllable

gird, set, firm, sear, gel, starch, clot, steels, steel, gels, bake, press, jell, fix, cake, sears, dry

2 Syllables

stiffen, kippers, gelling, contract, thickens, brace, anneals, congeal, close, nerve, infix, thicken, coarsen, compact, toughen, seared, jelled, congeals, froze, strengthen, strengthens, coarsens, freeze, gelled, buttress, curdle, temper, steeled, cement, stiffens, lopper, anneal, starching, settle, jelling, kipper, candying, jellying, tighten, steeling, tightens, callous, loppers

3 Syllables

kippering, congealed, weathered, gelating, uniting, pillared, tightening, ossify, inuring, ossifying, unite, thickening, glaciating, strengthening, annealing, annealed, reinforcing, pillaring, inured, fortify, congealing, thickened, glaciated, petrify, weathering, coarsening, tightened, inure, stiffened, calcify, torrefy, vitrify, jellify, gelate, glaciate, infixed, infixes, calcifying, stiffening, petrifying, densify, gelated, reinforce, strengthened

4 Syllables

rigidify, crystallize, habituating, inspissated, fossilize, acclimate, indurate, brutalize, brutalized, fossilizing, acclimating, habituate, solidify, climatize, brutalizing, acclimated

5 Syllables

precipitate, invigorated, coagulate, coagulated, mineralized, consolidate, invigorate, consolidated, mineralizing, gelatinize, mineralize, consolidating, coagulating, amalgamate, gelatinized