Collectaneas, a term that refers to a collection or anthology of writings, may have fewer antonyms than other words due to its specific definition. However, some opposite terms for collectaneas could include "dispersal" or "scattering," which would suggest that the writings were not gathered together but instead were dispersed. Another antonym could be "fragmentation," which would imply that the collection of writings was broken up and incomplete. "Disorganization" or "mess" could also be used as antonyms, suggesting that the collection was disorderly and lacked structure. Overall, while there may be limited antonyms for collectaneas, these terms reflect a lack of coherence and organization that are fundamental to the concept of a collection of writings.