Answer: This is an example of what you could do: The word you can put in front of "time" to make it compound is "lifetime."
Explanation: In the context of grammar and linguistics, a compound is a word that is composed of two or more separate words, combining to create a new word with a distinct meaning. In the case of "all-time," it's a compound word where "all" and "time" come together to form a single word with a specific meaning.
I hope this helps your understanding.
