Simple categories matching impervious:

• surface,
• envelope,
• paving,
• concrete,
• material,
• subsoil,
• clothing,
• covering,
• object,
• layer,
• fabric,
• area,
• glove,
• formation,
• item,
• container,
• film,
• cover,
• substance,
• nature,
• tile,
• flooring,
• rock,
• stone,
• construction,
• structure,
• substrate,
• conveyance,
• land,
• coating,
• membrane,
• catchment,
• paint,
• soil,
• receptacle,

Members with property impervious:

• blade,
• roads,
• polythene,
• shingle,
• driveway,
• oil_skin,
• asphalt,
• concrete,
• synthetic_liner,
• perspex,
• paved_street,
• latex,
• neoprene_hood,
• waterproof_paper,
• rooftop,
• road,
• pavement_picture,
• claystone,
• sport_court,
• parking_facility,
• polished_stone,
• street,
• fence,
• metal_side,
• sidewalk,
• paved_sidewalk,
• terminal_facility,
• roof,
• glass_vial,
• glove,
• hardpan,
• building,
• building_extension,
• slate,
• plastic_sheeting,
• metal_plate,
• marl,
• deck,
• development,
• rooftop_lead,
• gold_plating,
• ground,
• nitrile_polymer,
• wax,
• metal_wall,
• packed_earth,
• oiled_paper,
• coated_nylon,
• ceramics,
• concrete_roadway,
• side,
• tarmac,
• nitrile_glove,
• paved_driveway,
• pvc,
• major_roads,
• granite_boss,
• path,
• asphaltic_concrete,
• polythene_film,
• barnyard,
• rural_development,
• deck_area,
• town_street,
• metal_sheeting,
• marble,
• shoe_cover,
• polythene_bag,
• metal,
• clay_liner,
• antimicrobial_coating,
• footpath,
• silicone_grease,
• highway,
• garage,
• mylar_film,
• ballast,
• outbuilding,
• sleeve,
• sidewalk_range,
• solid_rock,
• nitrile,
• polyethylene_film,
• filling,
• earth,
• glue,
• massive_rock,
• glass_panel,
• parking-lot_cover,
• pavement,
• steel,
• asphalt_driveway,
• porcelain_tile,
• tarp,
• paint,
• boot,
• vinyl_paint,
• tub,
• pool,
• cement_grout,
• shale,
• paved_highway,
• asphalt_material,
• runway,
• pipe,
• cement_sidewalk,
• vinyl_wallpaper,
• paved_walkway,
• steps,
• barn,
• grout,
• storage_yard,
• cracked_stone,
• fibre_glass,
• hard_cement,
• hot_pavement,
• silicone,
• dense_limestone,
• overhang,
• unjointed_aluminium,
• clay,
• broken_glass,
• pedestrian_pathway,
• lino,
• paved_patio,
• curb,
• brickwork,
• wall,
• windows,
• foil,
• metal_cutlery,
• polyethylene_sheet,
• gypsum,
• urban_area,
• cl,
• hood,
• walking_area,
• gravel,
• urban_roads,
• tile,
• glass,
• alkyd_paint,
• concrete_slab,
• size,
• yard,
• porch,
• thermoplastic_bag,
• expanding_cement,
• building_foundation,
• brick_walkway,
• building_roof,
• sink,
• airstrip,
• culvert,
• wood,
• neoprene_rubber,
• excess_paving,
• equipment,
• gutter,
• cypress,
• polyethylene_bag,
• brick_box,
• clayey_sand,
• rubber_latex,
• aluminum_siding,
• butyl-rubber_glove,
• taxiway,
• expanded_polystyrene,
• roof_top,
• apron,
• shellac,
• concrete_sidewalk,
• vinyl_tile,
• roof_object,
• commercial_area,
• courtyard,
• varnish,
• car_yard,
• stainless-steel_sheeting,
• paved_roadway,
• aluminum,
• till,
• concrete_yard,
• polyethylene,
• driveway_area,
• addition,
• rock,
• roof_area,
• brick_paving,
• paved_roads,
• oil,
• polyethylene_papers,
• roadway_pavement,
• certain_soil,
• sand,
• gutter_line,
• roadway,
• dirty_gravel,
• plaster,
• bentonite,
• turret_overhang,
• linoleum_floor,
• red_sand,
• galvanized-iron_sheeting,
• crockery,
• factory_floor,
• pouch,
• puddle_clay,
• polyurethane,
• asphalt_pavement,
• paving,
• cement,
• linoleum,
• stainless,
• asphalt_roads,
• plastic_mine,
• brick,
• home,
• bentonite_clay,
• stone_dust,
• polished_wood,
• recreational_area,
• alley,
• building_wall,
• golf_clubhouse,
• concrete_lots,
• building_structure,
• blacktop,
• portland-cement_concrete,
• aluminium,
• cement_slurry,
• granite,
• concrete_driveway,
• mastic_asphalt,
• plastic_material,
• exterior_emulsion,
• stone,
• suit,
• whin,
• topsoil,
• clay_pan,
• plastic_sheet,
• argillaceous_limestone,
• stable,
• natural_soil,
• rubber_apron,
• footing_drain,
• patio,
• barium,
• silicon_rubber,
• plastic_sleeve,
• neoprene,
• city_street,
• downtown_city,
• nitrile_rubber,
• playground,
• structure,
• syringe,
• rubber,
• out_building,
• canvas,
• conventional_paint,
• walkway,
• portable_water,
• dark_paint,
• concrete_path,
• rubber_glove,
• solid_waste,
• natural_rubber,
• legging,
• rubber_sheet,
• asphalt_change,
• limestone,
• transit_facility,
• facial_protection,
• petrolatum,
• ceiling,
• paved_area,
• rooftop_pavement,
• bag,
• macadam,
• pitch_mastic,
• building_area,
• grapefruit-juice_carton,
• membrane,
• polyurethane_bag,
• burlap,
• mud,
• roof_shingles,
• masonry_paint,
• park_mansion,
• body_suit,
• suitable_paint,
• competent_shale,
• pail,
• bismuth,
• sandstone,
• silicone_film,
• drive,
• waxed_paper,
• waterproof_jacket,
• industrial_yard,
• roof_surface,
• floor_surface,
• nylon,
• silt,
• building_rooftop,
• mackintosh,
• stairway,
• packed_clay,
• house,
• sponge_rubber,
• house_pad,
• accessory_building,
• masonry,
• stone_patio,