Modifiers matching ground:

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

Simple categories matching undisturbed:

• location,
• area,
• place,
• land,
• site,
• system,
• ground,