delirium

delirium /dɪˈlirijəm/ noun
plural deliriums
delirium
/dɪˈlirijəm/
noun
plural deliriums
Britannica Dictionary definition of DELIRIUM
1 
: a mental state in which you are confused and not able to think or speak clearly usually because of fever or some other illness
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2 
[noncount] : a state of wild excitement and great happiness