Synonyms of the word 
IMPROVABLE → CORRIGIBLE
improvable
- adj. Capable of being improved; susceptible of improvement; admitting of being made better; capable of cultivation,…
- adj. Capable of being used to advantage; profitable; serviceable; advantageous.
- adj. Impossible to prove.
corrigible
- adj. Able to be corrected or set right.
- adj. (obsolete) Submissive to correction; docile.
- adj. (obsolete) Deserving chastisement; punishable.
- adj. (obsolete) Having power to correct; corrective.
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