solidness

noun

1.
the state in which a substance has no tendency to flow under moderate stress; resists forces (such as compression) that tend to deform it; and retains a definite size and shape
solid solid state
Derived from:
solid
2.
the consistency of a solid
solidity
Derived from:
solid
3.
the quality of being substantial or having substance
substantiality substantialness
Derived from:
solid
4.
the quality of being solid and reliable financially or factually or morally
solidity
Derived from:
solid