conflagration
Concise Oxford English Dictionary © 2008 Oxford University Press:
conflagration /ˌkɒnfləˈgreɪʃ(ə)n/
▶noun an extensive and destructive fire.
– origin C15: from L. conflagratio(n-), from conflagrare, from con- (expressing intensive force) + flagrare ‘to blaze’.
'conflagration' also found in these Oxford entries:

