| Main Entry: | firmness |
| Part of Speech: | noun |
| Definition: | stiffness |
Synonyms: |
compactness, density, durability, fixedness, hardness, impenetrability, impermeability, imperviousness, impliability, inelasticity, inflexibility, resistance, rigidity, solidity, temper, tensile strength, toughness |
Antonyms: |
flexibility, softness, weakness |