cascade

Noun

• a sudden downpour (as of tears or sparks etc) likened to a rain shower
  • a little shower of rose petals
    
  • a sudden cascade of sparks
    

• a succession of stages or operations or processes or units
  • progressing in severity as though a cascade of genetic damage was occurring
    
  • separation of isotopes by a cascade of processes
    

• a small waterfall or series of small waterfalls

Verb

• arrange (open windows) on a computer desktop so that they overlap each other, with the title bars visible

• rush down in big quantities, like a cascade

Related words

• Synonyms: 
  shower , cascade down