The word "more rebarbative" refers to something that is even more repellent or unpleasant than it already is. Therefore, antonyms for this term would be words that indicate something less unpleasant or more attractive. Some possible antonyms for "more rebarbative" include "attractive," "appealing," "charming," "delightful," "pleasurable," "desirable," "enticing," "welcoming," "agreeable," "fascinating," "captivating," "engaging," "enchanting," or "alluring." These words are opposite in meaning to "more rebarbative" and convey positive connotations, making them a great alternative for expressing a different tone or intention in communication.