Gravitate (toward) is a term that describes the natural tendency of objects to move toward each other due to the force of gravity. The crossword solutions for this term are TEND and LEAN, both four letters in length. TEND means to have an inclination or tendency to do something, while LEAN means to incline or bend from a vertical position. Together, these two words describe the action of gravitating toward something, which is the natural tendency of objects to move toward each other due to the force of gravity.