Found 2 items, similar to Cataclysmal.
English → English (WordNet) Definition: cataclysmal cataclysmal adj : severely destructive; “cataclysmic nuclear war”; “a cataclysmic earthquake” [syn: cataclysmic]
English → English (gcide) Definition: Cataclysmal Cataclysmal \Cat`a*clys"mal\, Cataclysmic \Cat`a*clys"mic\, a. Of or pertaining to a cataclysm. [1913 Webster]