Modifiers matching ground:

• porous,
• neutral,
• soft,
• unstable,
• barren,
• heavy,
• loose,
• hard,
• routine,
• uneven,
• sandy,
• high,
• rough,
• safe,
• rocky,
• particular,
• permeable,
• flat,
• up,
• waterlogged,
• harder,
• vertical,
• working,
• low,
• holy,
• artificial,
• level,
• off,
• open,
• new,
• convenient,
• dangerous,
• white,
• private,
• irregular,
• under,
• paved,
• metal,
• clear,
• disturbed,
• common,
• firm,
• hazardous,
• clean,
• old,
• slippery,
• moist,
• over,
• sized,
• technical,
• durable,
• coarse,
• difficult,
• good,
• bad,
• electrical,
• sensitive,
• rigid,
• softer,
• elevated,
• stable,
• grown,
• natural,
• wet,
• sacred,
• weak,
• shiny,
• uncultivated,
• dry,
• mechanical,
• woven,
• familiar,
• higher,
• conductive,
• metallic,
• unsecured,
• undisturbed,

Simple categories matching uneven:

• path,
• decoration,
• material,
• ground,
• surface,
• grounds,
• terrain,
• pattern,
• substrate,
• object,
• area,
• pavement,