Catabasis is a term used to describe a downward movement or descent. This word is often used in literature, mythology, and science to describe a figurative or literal journey into the depths of something. However, there are several other words that can be used interchangeably with catabasis to convey the same meaning. Some synonyms for catabasis include decline, descent, plunge, drop, decrease, downfall, dip, lowering, slump, and subsidence. These words can be used in a variety of contexts, including financial reports, geological studies, and literary analyses, to describe a movement or change from a higher level to a lower one. By using these synonyms, writers can add variety and depth to their language while conveying the same underlying meaning as catabasis.