Dead level is a term used to describe a completely flat surface or terrain. The opposite of dead level is a sloping or gradient surface. Antonyms for dead level can include words like hilly, uneven, sloping, inclined, angled, or sloped. These words describe a surface that is not completely flat and has varying elevations or angles. For example, a hiking trail may be hilly and have different levels of incline as it winds through the mountains. A road may be angled or sloping to accommodate for changes in elevation. Understanding the antonyms for dead level can help to accurately describe a landscape or terrain.