Modifiers matching ground:

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

Simple categories matching shiny:

• part,
• clothes,
• surface,
• object,
• jewelry,
• metal,
• fibre,
• weapon,
• wrap,
• material,
• accessory,
• thing,
• fabric,
• hardware,
• toy,
• ground,
• paper,
• trinket,
• cover,
• textile,
• subject,
• time,
• stone,
• substrate,
• alloy,
• embellishment,
• stuff,
• substance,
• garment,
• item,
• medium,
• decoration,
• matter,
• color,