- solid, 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
--1 is a kind of state of matter, state
- solidity, solidness - the consistency of a solid
--2 is a kind of consistency, consistence, body
--2 has particulars: compactness; impermeability, impermeableness