stiffen Synonyms

tighten constrain tighten up make stiff toughen toughening toughened tightening thicken thickening thickened tense strengthen stiffener stiffening steel starch solidify vitrify rigidification become stiff become rigid go rigid tensing tauten starken rigidify tensed ice over gel stabilize stabilise firm up fossilise tense up solidifying set restrengthen encrust curdle crystallize congeal condense concreted coagulate clot clabber cement calcify caking