Category Nuances matching terrain:

• open,
• over,
• uneven,
• dangerous,
• broad,
• geophysical,
• hazardous,
• featureless,
• diverse,
• flat,
• rugged,
• regular,
• difficult,
• unstable,
• rough,
• large,
• exciting,
• barren,
• irregular,
• complex,
• homogeneous,
• sensitive,
• grassy,
• varied,

Members for simple category terrain:

• potholed_yard,
• desert,
• minefield,
• field,
• sea_bed,
• grassland,
• mountainous_terrain,
• uncultivated_terrain,
• yard,
• arizona_desert,
• prairie,
• wet_grounds,
• forest_clearing,
• garden,
• construction_yard,
• battlefield,
• gravel_desert,
• lawn,
• savanna,
• lizard_range,
• soft_terrain,
• construction_site,
• rocky_terrain,
• park,
• landscaping,
• high_desert,
• wild_terrain,
• level_desert,
• maritime_terrain,
• cemetery,
• meadow,
• clearing,
• urban_center,
• sloping_terrain,
• hay_meadow,
• grassy_field,
• soccer_field,
• savannah,
• american_desert,
• rocky_glade,