Irresolvability :: Irresolvability (n.) The quality of being irresolvable; irresolvableness.
Resolvability :: Resolvability (n.) The quality or condition of being resolvable; resolvableness.
Solvability :: Solvability (n.) The quality or state of being solvable; as, the solvability of a difficulty; the solvability of a problem..
Solvability :: Solvability (n.) The condition of being solvent; ability to pay all just debts; solvency; as, the solvability of a merchant..