Disprovable :: Disprovable (a.) Capable of being disproved or refuted.
Disproval :: Disproval (n.) Act of disproving; disproof.
Improvability :: Improvability (n.) The state or quality of being improvable; improvableness.
Improvable :: Improvable (a.) Capable of being improved; susceptible of improvement; admitting of being made better; capable of cultivation, or of being advanced in good qualities..
Improvable :: Improvable (a.) Capable of being used to advantage; profitable; serviceable; advantageous.
Irreprovable :: Irreprovable (a.) Incapable of being justly reproved; irreproachable; blameless; upright.
Provable :: Provable (a.) Capable of being proved; demonstrable.