pan·de·mo·ni·um 
(păn′də-mōnē-əm)
(păn′də-mōnē-əm)n.
A condition or scene of noisy confusion: "The whole lobby was a perfect pandemonium, and the din was terrific" (Jerome K. Jerome). See Synonyms at noise.
[From Pandæmonium, capital of Hell in Paradise Lost, an epic poem by John Milton : Greek pan-, pan- + Greek daimōn, lesser god, demon; see DEMON + New Latin -ium, neuter n. suffix; see -IUM.]
pan′de·moni·ac (-nē-ăk′) adj.