The phrase "not moving" describes the state of being stagnant, stationary or immobile. However, there are many other synonyms that can be used to describe this condition, such as still, motionless, stationary, inert, idle, fixed, unchanging, immovable, rooted, at a standstill. These alternate terms can be used to convey a sense of stillness, lethargy, or at times even opposition. Depending on the context in which they are used, these synonyms can bring a different set of connotations to the table and can help add diversity and versatility to your descriptions. Using synonyms can add flavor and depth to your writing and help keep your readers engaged.