The word "obliterated waterfall" has a powerful and dramatic connotation of destruction and annihilation. There are several synonyms that can be used to describe this phenomenon, such as demolished cascade, destroyed cataract, ruined falls, obliterated rapids, or devastated stream. These synonyms emphasize the forceful and devastating impact of the water's flow, causing the landscape to be completely transformed and altered. These expressions are often used in the context of natural disasters or extreme weather events, showcasing the overwhelming power of nature. Whether it's a catastrophic flood or a massive landslide, the imagery of an obliterated waterfall captures the impressive and terrifying force of nature.