Simple categories matching empty:

• structure,
• container,
• drive,
• package,
• box,
• space,
• surface,
• item,
• thing,
• bottle,
• equipment,
• object,
• building,
• array,
• room,
• zone,
• tank,
• receptacle,
• body,
• vehicle,
• pleasure,
• jar,
• area,
• vessel,
• tin,

Members with property empty:

• plastic_box,
• milk_jug,
• corner,
• flask,
• drum,
• pit,
• glass_jar,
• container,
• hill,
• milk_container,
• mantelpiece,
• vial,
• bottle,
• mug,
• match_box,
• registry_hole,
• beverage_bottle,
• oat_box,
• end_zone,
• herbicide,
• roads,
• beaker,
• jar,
• large_flowerpot,
• empty_bottle,
• garage,
• empty_string,
• resin_bottle,
• launderette,
• glasses,
• auditorium,
• caulk_tube,
• hollow_log,
• entry_hall,
• box,
• void,
• break_room,
• tank,
• cleaners,
• industrial_site,
• floppy-disk_drive,
• ballast_tank,
• yoghurt_cup,
• solvent,
• classroom,
• stream,
• multiple_space,
• bowl,
• lipstick_case,
• stable,
• medicine_bottle,
• margarine_tub,
• lighter,
• motor-oil_drum,
• gold_room,
• surface,
• carboy,
• peanut-butter_jar,
• connected_pore,
• carton,
• paint_tin,
• resorption_cavity,
• large_pan,
• multipurpose_room,
• bulk_bag,
• lock,
• aspirin_bottle,
• table_top,
• factory,
• free_surface,
• bucket,
• apc,
• storage_jar,
• mug_cosmetic,
• side,
• mount,
• plastic_bottle,
• case,
• tray,
• bowls,
• flowerpot,
• barrels,
• background,
• drive,
• shampoo_bottle,
• banana_box,
• check_box,
• aircraft,
• soup_tin,
• pet_bottle,
• lakeside_cabin,
• appliance_box,
• vase,
• bag,
• crate,
• body_cavity,
• shipping_tank,
• bath_room,
• collection_system,
• oil,
• armory,
• position,
• hamper,
• fame,
• table,
• wealth,
• bin,
• mail_sack,
• nursery_pot,
• light,
• pore,
• storage_barrels,
• cavity,
• wall,
• salt_container,
• ampoule,
• anger,
• orange-juice_carton,
• windows,
• macaroni_box,
• spacecraft,
• milk_bottle,
• wide_street,
• tissue_box,
• barge,
• wardrobe_box,
• cup,
• potential_space,
• pizza_box,
• npc_home,
• facial-tissue_box,
• butter_tub,
• candy_tin,
• milk_carton,
• compact,
• tin,
• glass_bottle,
• glory,
• pet-food_bowls,
• dvd_drive,
• house,
• pipe,
• parking_garage,
• sleeve,
• birdbath,
• reflection,
• shoebox,
• icecream_container,
• crystal_imperfection,
• zero_number,
• crypt,
• oatmeal_container,
• sphere,
• cargo_van,
• flower_pot,
• thin_spline,
• clothing,
• airplane_hangar,
• warehouse,
• styrofoam_bowls,
• bean_tin,
• curd_pot,
• open_field,
• empty_pallet,
• abutment,
• turf,
• fish_aquarium,
• shoe_box,
• shelf,
• automotive_fluid,
• plate,
• candy_box,
• mouthwash_bottle,
• pail,
• scar,
• can,
• glass,
• cardboard_box,
• center,
• season_building,
• canister,
• cracker_box,
• large_beaker,
• paint,
• spray_bottle,
• ice-cream_basket,
• american_west,
• office,
• yogurt_tub,
• food_package,