The phrase "deliver up" can be replaced by a number of synonymous expressions. Some of the most commonly used ones include surrender, turn over, hand in, give up, relinquish, yield, and cede. Each of these synonyms conveys the sense of giving something over to another person or entity, often in a formal or official manner. Depending on the context, certain synonyms may be more appropriate than others. For example, "surrender" may be most appropriate in the context of war or conflict, while "relinquish" may be more fitting in the context of legal or contractual matters.