Simple categories matching horizontal:

• intrusion,
• opening,
• surface,
• structure,
• matter,
• edge,
• document,
• unit,
• object,
• wall,
• base,
• line,
• track,
• measure,
• installation,
• member,
• assembly,
• location,
• space,
• development,
• activity,
• discipline,
• practice,
• area,
• layer,
• chair,
• projection,
• overhang,
• ware,
• print,
• arrangement,
• market,
• part,
• process,
• barrier,
• cylinder,
• publication,
• subject,
• connection,
• rod,
• axis,
• force,
• institution,
• door,
• place,
• aid,
• construction,
• component,
• support,
• blind,
• panel,
• beam,
• neckline,
• property,
• rail,
• dimension,
• siding,
• standard,
• grating,
• joint,
• model,
• obstruction,
• feature,
• thing,
• enterprise,
• boundary,
• faculty,
• slab,
• trapezoid,
• connector,
• action,
• issue,

Members with property horizontal:

• piano_bench,
• table,
• counter_top,
• agar_plate,
• floor,
• structure,
• shiny_floor,
• wall,
• windows,
• table_top,
• capacity_building,
• auto_windshield,
• blizzard,
• pool_deck,
• ceiling,
• leadership,
• roof_top,
• wave,
• bracket,
• earthquake,
• pool,
• railroad,
• shelf,
• terminal,
• roof,
• ground,
• wings,
• business_intelligence,
• plywood_sheet,
• window_sills,
• plywood,
• aforementioned_dashboard,
• water,
• desk,
• over_bed,
• ceramic_tile,
• international_relations,
• maintenance,
• vegetation_mosaic,
• landscape,
• consumer_finance,
• funding_mechanism,
• waist_girth,
• seismic_force,
• suv,
• aluminum_siding,
• sliding_windows,
• padded_crossbar,
• walkway,
• pipe,
• fabric,
• shower_tray,
• parking_deck,
• elevated_platform,
• road_marking,
• street,
• forecast_accuracy,
• garage,
• slab,
• energy_tax,
• forward_propulsion,
• ceiling_beam,
• balcony,
• vertical_component,
• brick,
• steps,
• dresser,
• tabletop,
• point,
• stump,
• forward_thrust,
• table_edge,
• construction,
• wind_pressure,
• thrust,
• quota,
• building_facade,
• terrain_feature,
• library,
• entry,
• financial_service,
• carpeting,
• stairs,
• wet_roads,
• bitumen_roads,
• use,
• tax,
• paved_surface,
• mantle,
• basic_training,
• hood_trunk,
• floor_system,
• rectangle,
• industrial_floor,
• kitchen_counter,
• hood,
• child,
• support,
• environmental_assistance,
• education,
• patio,
• validation,
• masonry,
• judgment,
• slab_push,
• railing,
• pier_railing,
• assistance,
• engineering_service,
• duct,
• width,
• basement,
• biology,
• perimeter_fence,
• proprietary_system,
• whole,
• fold,
• quality,
• bed,
• real_estate,
• global_standard,
• information_management,
• roof_area,
• booth_shelf,
• porch_railing,
• balcony_slab,
• length,
• sink_bar,
• cabinet,
• road_pavement,
• foundation_pad,
• areal_extent,
• apron,
• coping,
• tray,
• basin,
• wave_length,
• drive,
• roadside_edge,
• competition_policy,
• system,
• lower_edge,
• concrete,
• warehouse_pallet,
• canvas,
• surveillance,
• stairwell,
• refueling_apron,
• street_park,
• louver,
• dresser_top,
• bottom,
• pavement_joint,
• vinyl_chair,
• ship_deck,
• democracy,
• cell_loss,
• alcove_ceiling,
• curtain_rod,
• drywall,
• outdoor_furniture,
• vertical_track,
• government_initiative,
• building_floor,
• fiberglass,
• clap_board,
• warehouse_floor,
• lisbon_strategy,
• overall_width,
• bookshelf,
• ethics,
• dissemination_activity,
• skill_development,
• moiety_type,
• sheet,
• evaluation,
• planning,
• fork,
• highway_tunnel,
• radiation_protection,
• soffit,
• troposphere,
• grating,
• grading_activity,
• cot_side,
• basement_area,
• parapet_cap,
• floe_size,
• regional_aid,
• boat-deck_rail,
• floor_weekly,
• ice,
• rear_deck,
• first_course,
• reactivity_coefficient,
• organic_farming,
• bedspread,
• corporate_culture,
• open_web,
• deck,
• basement_floor,
• field_service,
• library_table,
• exchange,
• closet_floor,
• window_line,
• electrical_conduit,
• bench_top,
• display_table,
• appliance_top,
• foundation_unit,
• spray,
• optical_bench,
• nutrition,
• virtual_form,
• paving_slab,
• plate,
• lock-chamber_floor,
• ring_beam,
• judgement,
• fog,
• hurricane,
• highway,
• kitchen_countertop,
• risk_analysis,
• arch,
• wood_deck,
• interdependency_analysis,
• domestic_court,
• procurement_system,
• horizon,
• building_foundation,
• wind,
• aircraft_runway,
• startup_support,
• backyard_patio,
• pavement,
• walkway_elements,
• booth_floor,
• standard,
• garage_floor,
• cart_surface,
• vein,
• skyline,
• dissemination,
• stairway,
• wall-street_journal,
• trunk_deck,
• furniture,
• display_shelf,
• demonstration,
• bathtub,
• loading_platform,
• bathroom_sink,
• cladding_layer,
• engineering,
• silo_theatre,
• vertical_dimension,
• geology,
• window_head,
• under_slab,
• path,
• idler_friction,
• greek-key_pattern,
• airport,
• belt_drag,
• chicane,
• warehouse,
• door_panel,
• entryway,
• layer,
• block_wall,
• wood_blind,
• adjacent_gurney,
• sidewalk,
• square,
• stall_door,
• fascia,
• rail,
• transom,
• stratus,
• sofa,
• road_rehabilitation,
• edge,
• beam,
• work,
• private_financing,
• earthquake_load,
• diaphragm,
• stilling_basin,
• van,
• wood_shingles,
• court,
• building,
• heating,
• hip_girth,
• ladder,
• parapet,
• tile,
• lectern,
• snow,
• architecture,
• altostratus,
• support_track,
• cowl,
• line,
• pergola,
• roadway_pavement,
• turnstile_support,
• amalgamation_surface,
• mini_blind,
• countertop,
• commerce_service,
• patent_pool,
• finance,
• socioeconomic_study,
• industrial_plant,
• deck_rail,
• small_text,
• stratosphere,
• sloping_surface,
• display,
• infrastructure_service,
• roof_element,
• elevator,
• procurement,
• meeting,
• tree,
• end_vane,
• molding,
• asphalt_concrete,
• narrowing,
• clapboard,
• shower-curtain_rod,
• sea_water,
• boarding_platform,
• sawhorse,
• compactness,
• stretcher_mattress,
• assets,
• stucco_facade,
• riser,
• wire,
• counter,
• concrete_sidewalk,
• flooring_elements,
• flooring,
• roof_overhang,
• trim,
• closet_door,
• shoulder,
• podium,
• ceiling_joist,
• slate,
• rope,
• end_table,
• flat_floor,
• windshield,
• cement,
• bridge-deck_slab,
• cost_control,
• employment_aid,
• floor_slab,
• paved_area,
• export_restriction,
• energy_efficiency,
• sea-breeze_front,
• stringer,
• consumer_protection,
• bowls,
• horizontal_trapezoid,
• wood_clapboard,
• guardrail_end,
• water_surface,
• astronomy,
• windowsill,
• concrete_slab,
• deck_flooring,
• crown_molding,
• terrace,
• linoleum,
• polygonal_area,
• high_technology,
• canopy,
• pavement_slab,
• public_perception,
• participatory_democracy,
• project,
• reference_model,
• roof_line,
• log,
• office-building_rooftop,
• natural_stone,
• stair_system,
• new_city,
• seat,
• boat_neckline,
• bottom_plating,
• wood,
• documentation,
• door_frame,
• car,
• equipment,
• radiator,
• automobile_hood,
• verandah,
• safety,
• desktop,
• network,
• domestic_regulation,
• grading,
• trading_house,
• carpet,
• porch,
• asphalt,
• siding,
• chair,
• light,
• veterinary_service,
• airport_taxiway,
• priority_narrowing,
• vertical_surface,
• workbench,
• concrete_floor,
• ocean_surface,
• box,
• accounting,
• penetration,
• basic_research,
• concrete_wall,
• chair_arm,
• trough,
• area,
• drawers,
• finance_report,
• contour,
• limb,
• concrete_deck,
• population_education,
• norm,
• textile_fabric,
• roadway,
• wooden_deck,
• drop,
• heater,
• tie,
• sink,
• road,
• cabinet_roof,
• door_top,
• bench_surface,
• eaves,
• communications_guideline,
• mandibular_canal,
• stone,
• friction,
• strategic_study,
• return,
• concrete_driveway,
• light_fixture,
• longitude,
• vehicle_dashboard,
• handicap_ramp,
• parking-lot_surface,
• array,
• literacy_training,
• handrail,
• bulkhead_girder,
• pathway,
• book,
• intellectual-property_right,
• roof_ridge,
• desk_top,
• quality_assurance,
• powerful_wind,
• bench,
• exterior_deck,
• quantum_map,
• fallen_log,
• chest_girth,
• lintel,
• curb,
• column_cover,
• girder,
• platform,
• icy_roads,
• curb_paving,
• chair_rail,
• court_house,
• tree-fern_slab,
• porch_floor,
• door_jamb,
• elliptical_area,
• window,
• paved_road,
• car_roof,
• roads,
• mantle_piece,
• lattice_grating,
• department,
• mattress,
• bug,
• slab_foundation,
• water-supply_canal,
• flat_rooftop,
• worktable,
• sills,
• port_floor,
• fence,
• glass_sheet,
• choral_society,
• measurement,
• roof_beam,
• dash_board,
• intellectual-property_protection,
• large_windows,
• connecting_pin,
• aircraft_floor,
• operation,
• cable,
• administration,
• set,
• concrete_platform,
• ekg,
• partition,
• chemistry,
• living-room_carpet,
• deck_surface,
• latitude,
• production,
• ice_compactness,
• top,
• pe_sheet,
• marketing,
• balcony_floor,
• foundation,
• fence_railing,
• wind_force,
• sofa_seat,
• regulation,
• industrial_policy,
• porch_ceiling,
• house,
• door,
• language_training,
• runway,
• policy_formulation,
• runway_surface,
• furniture_top,
• pool_floor,
• sustainable_development,
• vertical_connection,
• fence_board,
• safe_conservation,
• social_science,
• international_cooperation,
• crawlspace,
• bath,
• soccer_club,
• steel,
• bedside_table,
• flat_roof,
• working_surface,
• plasterboard,
• european_dimension,
• airport_runway,
• column,
• laboratory_workbench,
• magazine,
• deck_floor,
• boot_floor,
• system_architecture,
• skin,
• test_method,
• roof_slab,
• bottom_edge,
• vertical_panel,
• open_area,
• service-station_apron,
• end,
• dusty_surface,
• training,
• window_sill,
• deck_lid,
• expressway,
• conference,
• memory,
• field,
• car_hood,
• driveway,
• chair_seat,
• ground_line,
• attention,