Synonyms of stiffen
1 become stiff • The fine-tuning lens in the eye stiffens with age.
set • Lower the heat and allow the omelette to set on the bottom.
harden • Mould the mixture into shape before it hardens.
thicken • Keep stirring until the sauce thickens.
solidify • The thicker lava would have taken two weeks to solidify.
crystallize • Keep stirring the mixture or the sugar will crystallize.
congeal • The blood had started to congeal.
coagulate • The blood coagulates to stop wounds bleeding.
2 tightenDictionary • The blood supply to the skin is reduced when muscles stiffen.
tighten • He flung his whole weight back, tightening the rope.
3 strengthenDictionary • Canada has recently stiffened its immigration rules.
strengthen • Such antagonism, he has asserted, strengthened his resolve.
reinforce • They had to reinforce the walls with exterior beams.
harden • Their action can only serve to harden the attitude of landowners.
toughen • laminated and toughened glass
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coagulateWhen a liquid coagulates, it becomes very thick.
• The blood coagulates to stop wounds bleeding.
congealWhen a liquid congeals, it becomes very thick and sticky and almost solid.
• The blood had started to congeal.
• Keep stirring the mixture or the sugar will crystallize.
Thesaurus for stiffen from the Collins English Thesaurus