Reduplication is a linguistic phenomenon where a word or a portion of a word is repeated to create a new form, often with a modified meaning. When it comes to words that can be reduplicated, "more" is a common candidate. However, there are several synonyms for "more reduplicating" that can be used to add variety and precision to one's language. Some examples of such synonyms are "further multiplying," "doubling down," "reiterating again," "repeating once more," "echoing again," or "duplicating repeatedly." These expressions all convey the idea of repetition or intensification, albeit with different nuances. Choosing the most fitting synonym will depend on the specific context and tone of the sentence.