A lit relaxation room is a space that is designed to provide a calming and peaceful environment. Synonyms for the phrase could include a serene lounge, a tranquil sanctuary, a soothing retreat, a peaceful haven, a calm oasis, a restful escape, a serene chamber, a tranquil nook, a quiet contemplation space, a relaxed hideaway, a peaceful enclave, or a rejuvenating lounge. The key idea behind each synonym is the sense of calm and tranquility that is embodied in the relaxing space. The words chosen should convey a sense of serenity, natural beauty, and restfulness. Whether you call it a lounge, a sanctuary, or a relaxation room, the goal is to provide a haven from the chaotic world outside.