Modifiers matching ground:

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

Simple categories matching firm:

• fish,
• foundation,
• surface,
• move,
• base,
• size,
• body,
• substrate,
• vegetable,
• measure,
• competency,
• solid,
• topic,
• performance,
• fruit,
• input,
• whitefish,
• fabric,
• attribute,
• apple,
• material,
• earth,
• object,
• item,
• fixture,
• rock,
• fillet,
• substance,
• tissue,
• control,
• plate,
• integration,
• structure,
• part,
• characteristic,
• mixture,
• dimension,
• support,
• resource,
• shape,
• meat,
• soil,
• area,
• veggie,
• ground,
• variable,
• value,
• quality,
• success,
• plum,
• collar,
• practice,
• policy,
• upright,
• assets,
• organization,
• container,
• thread,
• cookie,
• function,
• data,
• involvement,
• feature,
• behavior,
• ceiling,
• commitment,
• happening,
• food,
• level,
• activity,
• trait,
• program,
• candy,
• particle,
• foodstuff,
• melon,
• information,
• component,