vast B1

/vast/ Extremely large in size, amount, or extent.

devastation C2+

/ˌdɛvəˈsteɪʃən/ severe and widespread destruction or ruin

wasteland C2+

/ˈweɪstlænd/ a barren or desolate area of land

vastly C2+

/ˈvæstli/ to a very great extent or degree

wastefulness C2+

/ˈweɪst.fəl.nəs/ the quality of using resources carelessly or extravagantly

wasteness C2+

/ˈweɪst.nəs/ the condition of being a desolate waste; barren emptiness