Modifiers matching ground:

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

Simple categories matching open:

• basin,
• space,
• area,
• situation,
• activity,
• structure,
• ground,
• land,
• issue,
• liquid,
• water,
• ampoule,
• appliance,
• version,
• section,
• shelter,
• substance,
• ocean,
• sea,
• envelope,
• dish,
• surface,
• system,
• item,
• container,
• sector,
• building,
• prey,
• information,
• wound,
• science,
• fixture,
• car,
• country,
• package,
• conduit,
• region,
• cell,
• flow,
• seam,
• location,
• service,
• site,
• nester,
• room,
• form,
• volume,
• type,
• conveyance,
• office,
• article,
• forum,
• vessel,
• forest,
• feature,
• beam,
• institution,
• roll,
• specification,
• environment,
• entity,
• unit,
• competition,
• air,
• door,
• receptacle,
• housing,
• meat,
• habitat,
• lagoon,
• program,
• territory,
• grain,
• curve,
• shape,
• gesture,
• projection,
• construction,
• equipment,
• highway,
• standard,
• orifice,
• marketplace,
• field,
• flower,
• excavation,
• cover,
• document,
• face,
• wall,
• function,
• view,
• group,
• box,
• waterway,
• workplace,
• stairway,
• pit,
• part,
• stage,
• fire,
• image,
• source,
• mollusc,
• implementation,
• burning,
• business,
• medium,
• menu,
• designer,
• woodland,
• procedure,
• boat,
• code,
• meeting,
• canopy,
• passage,
• resistance,
• object,
• struggle,
• aquarium,
• file,
• pattern,
• society,
• network,
• application,
• light,
• event,
• watercourse,
• organization,
• conflict,
• design,
• knowledge,
• market,
• position,
• powerboat,
• body,
• vehicle,
• terrain,
• clearing,
• community,
• patch,
• collocation,
• protocol,
• grassland,
• bivalve,
• place,
• fencing,
• food,
• establishment,
• nut,
• fabric,
• perch,
• vegetation,
• shellfish,
• enclosure,
• thing,
• facility,
• material,