Antonyms of noun hardness

1 of 5 senses of hardness

Sense 1
hardness -- (the property of being rigid and resistant to pressure; not easily scratched; measured on Mohs scale)
       Antonym of softness (Sense 1)
      => softness -- (the property of giving little resistance to pressure and being easily cut or molded)

Synonyms/Hypernyms (Ordered by Estimated Frequency) of noun hardness

5 senses of hardness

Sense 1
hardness -- (the property of being rigid and resistant to pressure; not easily scratched; measured on Mohs scale)
       => consistency, consistence, eubstance, body -- (the property of holding together and retaining its shape; "wool has more body than rayon"; "when the dough has enough consistency it is ready to bake")

Sense 2
hardness -- (a quality of water that contains dissolved mineral salts that prevent soap from lathering; "the costs of reducing hardness depend on the relative amounts of calcium and magnesium compounds that are present")
       => quality -- (an essential and distinguishing attribute of something or someone; "the quality of mercy is not strained"--Shakespeare)

Sense 3
unfeelingness, callousness, callosity, hardness, insensibility -- (devoid of passion or feeling; hardheartedness)
       => insensitivity, insensitiveness -- (the inability to respond to affective changes in your interpersonal environment)

Sense 4
hardness, ruggedness -- (the quality of being difficult to do; "he assigned a series of problems of increasing hardness"; "the ruggedness of his exams caused half the class to fail")
       => difficulty, difficultness -- (the quality of being difficult; "they agreed about the difficulty of the climb")

Sense 5
severity, severeness, harshness, rigor, rigour, rigorousness, rigourousness, inclemency, hardness, stiffness -- (excessive sternness; "severity of character"; "the harshness of his punishment was inhuman"; "the rigors of boot camp")
       => sternness, strictness -- (uncompromising resolution)