1. Susceptible of improvement; that may be used to advantage.

Nuttall's Standard dictionary of the English language By Nuttall, P.Austin

• improval,
• improable,
• improbible,
• impropable,
• approvable,
• impereviable,
• improvavle,
• improvvable,
• improvablle,
• improvablee,
• improvible,
• imprforable,
• imploiable,
• Reprovible,
• introvable,
• Improvebly,
• Improvablie,
• improble,
• impresable,
• reprovalle

• improbably,
• improvidence,
• impregnably,
• improver,
• improving,
• improvement,
• improved,
• improper,
• improvidently,
• impressible,
• improvident,
• improvised,
• improbable,
• improve,
• impregnable,
• improbability,
• improvize,
• improvise.

The adjective form of the word "improvable" is "improvable".

The plural form of the word "improvable" is "improvables".

The singular form of the word "improvable" is "improvable". The word does not change form in its singular or plural form.