4 words in this vocabulary list
noun a time of intense difficulty, trouble, or danger
adjective relating to or denoting a time of intense difficulty, trouble, or danger
noun a region suffering from prolonged drought and dust storms, especially one in the central United States in the 1930s
noun a blend of the words 'air' and 'apocalypse', used to describe a severe or catastrophic air pollution event
noun a type of intense dust storm carried on an atmospheric gravity current