BehemothBe‧he‧moth /bəˈhiːmɒθ $ -mɑːθ/ noun 
an extremely large, mythical creature mentioned in the Bible, whose name is now used to describe something very big: 
five warships, including two 64,000-ton behemoths → leviathan
an extremely large, mythical creature mentioned in the Bible, whose name is now used to describe something very big: five warships, including two 64,000-ton behemoths → leviathan