The word "othernesses" does not have a direct antonym as it is a plural noun form of "otherness," which refers to the state of being different or distinct from a particular group or individual. However, some possible antonyms to the underlying concept of "otherness" could include words such as sameness, similarity or familiarity. These words suggest a sense of belonging, connection or shared traits, rather than the sense of separation or difference that the term "otherness" implies. Ultimately, the concept of "otherness" can be complex and nuanced, and there may not be a simple or straightforward opposite to this idea.