The word "non-gregarious" refers to a person or an animal who does not socialize or prefer solitude. The antonyms for non-gregarious include terms like social, gregarious, outgoing, friendly, sociable, and extroverted. Social people enjoy being in the company of others, while gregarious individuals are typically talkative and enjoy being around other people. These traits often make them outgoing and friendly, and they may even seek out opportunities to socialize. On the other hand, some individuals may prefer to stay in their own company, which makes them introverted and uninterested in socializing. Therefore, the antonyms for non-gregarious revolve around characteristics that are opposite to the act of being reclusive.