Superableness is a rare and intriguing word that describes an excessive or overflowing quality. While synonyms for this term may not be as common, they can help to convey a similar meaning. Words such as abundance, profusion, surplus, and plethora capture the essence of superableness, emphasizing an exceeding amount. Other synonyms like extravagance, copiousness, and plenitude highlight the idea of an extravagant or ample quantity. The word overflow, which suggests an excess that cannot be contained, could also be used as a synonym. Although superableness may not have an extensive list of synonyms, these words can effectively convey the concept of an overflowing and abundant quality.