Synonyms and Antonyms of firm
to become physically firm or solid wait for the modeling clay to firm up before handling the finished pot Synonyms of firm up concrete, congeal, harden (up), freeze, indurate, set, solidifyWords Related to firm up cake, callus, encrust (also incrust); clot, coagulate, gel, gelate, gelatinize, jell, jelly, stiffen, thicken; calcify, crystallize (also crystalize), ossify, petrify, rigidify; anneal, case-harden, temperNear Antonyms of firm up deliquesce, dissolve, flux, fuse, melt, smelt, thaw, unfreezeAntonyms of firm up liquefy (also liquify), soften
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