When it comes to finding synonyms for the word "keepable", several alternatives come to mind. One option is "retainable", which implies the ability to hold onto or preserve something. Similarly, "maintainable" suggests the capability of keeping an item or situation in a certain condition or state. Another potential synonym could be "preservable", conveying the idea of safeguarding or protecting an object or concept. Additionally, "sustainable" might be used as a synonym for "keepable", highlighting the ability to maintain or support something over time. These synonyms all emphasize the notion of preserving or maintaining something, capturing the essence of the word "keepable" in various contexts.