Repetitiousnesses, the act of repeating things over and over again, has several antonyms. The first antonym is spontaneity, which refers to doing things without pre-planning. The second antonym is diversity, which means the quality of being different or diverse. Thirdly, variability is another antonym, which refers to the ability to be changed or made different. Variety, which means a range of different things or situations, is another antonym. Finally, originality is an antonym of repetitiousnesses, indicating that something is new and unique rather than copied or repeated. These antonyms provide alternatives to the repetitive nature of certain actions or behaviors.