Crossword solverSynonyms for stiffness12 crossword answers for “stiffness” (9), sorted by letter count.How many letters?All12516181931021111211325 letters 1rigor6 letters 1rigour8 letters 1hardness9 letters 3harshnessgaucherierusticity10 letters 2inclemencyclumsiness11 letters 1awkwardness12 letters 1rigorousness13 letters 2rigourousnessgracelessness