Similar meaning, but slightly different emphasis:
* Sociable: Emphasizes enjoying the company of others and being friendly.
* Outgoing: Emphasizes approaching others readily and being extroverted.
* Affable: Emphasizes being easy to talk to and pleasant.
* Convivial: Emphasizes being cheerful and enjoying social gatherings.
* Amiable: Emphasizes being friendly and good-natured.
* Communicative: Emphasizes being open to talking and sharing with others.
* Companionable: Emphasizes enjoying being with others and providing good company.
More formal or specialized synonyms:
* Gregariousness: This is the noun form of gregarious.
* Social: This is a broader term that encompasses being involved in society, but can also be used in the sense of being gregarious.
* Extroverted: This is a psychological term that describes someone who draws energy from being with others.
Words with a slightly negative connotation:
* Talkative: This can suggest someone who talks excessively.
* Chatty: This can suggest someone who is overly familiar or gossipy.
The best synonym to use depends on the specific context and the nuance you want to convey.