delirium delirium /dɪˈlɪriːəm/

noun

1. () State of violent mental agitation  ( craze , hysteria , delirium , frenzy , fury )
   state of violent mental agitation
     The shoppers were in a frenzy, rushing to grab the discounted items.
   The shoppers were in a frenzy, rushing to grab the discounted items.
   
2. A usually brief state of excitement and mental confusion often accompanied by hallucinations  ( delirium )
   a usually brief state of excitement and mental confusion often accompanied by hallucinations