* Abundance: Signifies a plentiful or overflowing amount, the opposite of a trace or remnant.
* Fullness: Represents a state of completeness and wholeness, contrasting with the idea of a fragment or fading trace.
* Remainder: Though similar in meaning, it suggests a larger, more substantial portion rather than a mere vestige.
* Evidence: While not directly opposite, it implies a strong presence and affirmation, contrasting with the uncertainty or ambiguity of a vestige.
* Peak: This word suggests a high point, the opposite of a dwindling remnant or fading trace.
The best antonym will depend on the specific context in which you are using the word "vestige."