荒廃【こうはい】
ruin, destruction, devastation, waste, decay
荒れる【あれる】
to become stormy, to become rough (of the sea), to fall into ruin, to become neglected, to become dilapidated, to become rough (of skin), to get chapped, to become unruly, to become violent, to go wild, to get out of control, to become unsettled (e.g. of one's life), to become disordered
荒らす【あらす】
to lay waste, to devastate, to damage, to invade, to break into, to troll (e.g. web forums), to spam
荒野【こうや】
wasteland, wilderness, deserted land, prairie, vast plain, wilds, desert, wild land
荒っぽい【あらっぽい】
wild, violent, rough-mannered, rude, rough (e.g. work), crude, coarse, careless
荒い【あらい】
rough, wild, violent, rude, coarse, harsh, fierce, heavy (e.g. breathing), immoderate, extravagant, reckless
荒々しい【あらあらしい】
rough, wild, rude, harsh, gruff, violent