"Reduplicated" is a term used to refer to a process of repeating a word or a syllable to create emphasis, rhythm or stress in language. However, some antonyms of "reduplicated" could include "unique", "singular", "distinct", "individual" and "original". These words convey the idea of something that is not repeated, duplicated or copied. They suggest authenticity, novelty and creativity. When communicating, it is important to use a variety of language structures and styles to provide clarity and interest to your message. So, while "reduplicated" can be a useful technique in language, exploring its opposites can also be equally informative and valuable in conveying your message.