Profligateness, which refers to wastefulness and extravagance, has several antonyms that suggest a more restrained and responsible approach toward money and resources. One antonym is thriftiness, which denotes a careful use of resources and an avoidance of unnecessary expenditure. Another antonym is frugality, which suggests a willingness to live within one's means and make do with less. Prudence is another antonym that captures the idea of careful planning, foresight, and good judgment in financial matters. Finally, moderation and temperance are antonyms that convey the idea of avoiding excess and maintaining a balanced and sensible approach to money and other resources.