Steepening is a term that describes an increase in the steepness or angle of something. There are several synonyms that can be used in place of steepening, such as inclining, slanting, tilting, angling, ascending, rising, or elevating. These words are often used interchangeably in both formal and informal settings, and can be applied to a variety of situations, such as the steepening of a mountain slope, the inclining of a road or pathway, or the rising of a graph or chart. Whichever synonym is used, it conveys the same idea of an increase in steepness, making communication clear and straightforward.