Um,
enormity can mean "big"
e·nor·mi·ty
–noun, plural -ties
3. greatness of size, scope, extent, or influence; immensity: The enormity of such an act of generosity is staggering.
And literally could sort of be used right there (def 4)
lit·er·al·ly
–adverb
3. actually; without exaggeration or inaccuracy: The city was literally destroyed.
4. in effect; in substance; very nearly; virtually.
I'll give you armed gunmen though.
Better choices for the words exists but that doesn't mean you shouldn't use them if you use them correctly in a sentence.