Solidness

n.	1.	State or quality of being solid; firmness; compactness; solidity, as of material bodies.
	2.	Soundness; strength; truth; validity, as of arguments, reasons, principles, and the like.

Noun	1.	solidness - 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 Synonyms: solid
	2.	solidness - the consistency of a solid Synonyms: solidity

solid, state, state of matter