There are various synonyms for the term "lit window". Some of these include illuminated window, glowing window, sparkling window, shining window, and radiant window. The term "illuminated window" suggests that the window is lit up with light, whereas "glowing window" implies a warm and radiant light. The term "sparkling window" suggests that the light shining through the window is bright and vibrant. "Shining window" is a simple and straightforward synonym, while "radiant window" suggests a light that is not only bright but also beautiful. Overall, these synonyms add a poetic touch to describe a simple element of architecture, bringing to mind images of a cozy home or a bustling cityscape at night.