Get down means to descend from a higher place or to crouch low to the ground. If you're looking for synonyms to convey the same meaning, you may want to use words like descend, alight, lower, or drop. You can also use words like crouch, squat, kneel, or couch to describe the action of bending or lowering oneself towards the ground. Other useful synonyms for getting down can be tumble, topple, fall, or slip, which are more often used to describe unintentional descents. In any case, the choice of words largely depends on the context in which you're using them, so choose wisely!