The word "un-correctable" means that something cannot be fixed or made right. Antonyms for this word would be "fixable," "correctable," "adjustable," or "rectifiable." These words signify that there is a possibility to remedy the issue or problem at hand. "Mendable" and "reparable" are also suitable antonyms, indicating that something can be restored to its proper state. Alternatively, "perfect," "faultless," "immaculate," and "flawless" are antonyms that describe something that has no issues and is wholly ideal. Overall, there are various antonyms for "un-correctable" that convey a sense of hope or perfection rather than the hopelessness of something that cannot be fixed.