The antonyms for the word "loss of value" are gain, appreciation, increase, enhancement, augmentation, rise, growth, improvement, and development. When an asset or commodity gains value, it experiences an increase or improvement. Appreciation refers to the rise in the worth of a commodity over time. Similarly, enhancement and augmentation depict the improvement in the quality or value of an asset. Growth and development imply the gradual increase in value or worth over an extended period. Hence, these antonyms illustrate how the opposite of loss of value is related to progress and improvement, rather than a decline.