There are many synonyms for the term "sits in." Some of the most common synonyms include occupy, inhabit, settle, reside, lodge, and take up residence. Other synonyms include ensconce, nestle, plant oneself, perch, roost, squat, and station oneself. Each of these words implies a slightly different connotation than "sits in." For example, "occupy" suggests a more active and purposeful placement, while "reside" implies a more long-term and permanent arrangement. Similarly, "plant oneself" suggests a more intentional choice of location than "sits in." By using different synonyms, writers can add variety to their language and express their ideas in different ways.