Simple categories matching sturdy:

• metal,
• equipment,
• material,
• furniture,
• bag,
• paper,
• cutter,
• board,
• substrate,
• brush,
• surface,
• object,
• fabric,
• tree,
• protection,
• structure,
• stick,
• prop,
• footwear,
• enclosure,
• container,
• base,
• compound,
• book,
• toy,
• herb,
• clothing,
• plant,
• post,
• card,
• pot,
• pole,
• instrument,
• cloth,
• support,
• fixture,
• shelter,
• bench,
• device,
• item,
• paint,
• bicycle,
• product,
• furnishing,
• component,
• shoes,
• pan,
• wood,
• green,
• cotton,
• clothes,
• stone,
• predator,
• box,
• stuff,

Members with property sturdy:

• sheet,
• elastic_band,
• similar_metal,
• workbench,
• heavy_table,
• plastic_crate,
• desk,
• metal_rod,
• denim,
• fiber,
• table,
• suit,
• romaine,
• stairwell,
• stake,
• tubular_steel,
• wood,
• case_steel,
• liquid-detergent_bottle,
• twill,
• rosemary,
• wall,
• copy_paper,
• zinc_alloy,
• steel,
• drink_machine,
• stainless,
• no,
• heavy_desk,
• felt,
• copper,
• field-goal_post,
• heavy_workbench,
• pine,
• trellis,
• slubbed_cloth,
• large_tree,
• nickel,
• copper_metal,
• cloth,
• dresser,
• heavy_twill,
• stick,
• sport_bag,
• box_steel,
• touring_bicycle,
• dog_stake,
• quartz,
• index_card,
• exercise,
• ballistic_nylon,
• corduroy,
• weightlifting_bench,
• frame_part,
• spinach,
• brick,
• house,
• water_shoes,
• granite,
• concrete_block,
• casserole_dish,
• large_table,
• foam,
• pin_brush,
• leopard,
• dish_pan,
• ripcord,
• tin_snips,
• board,
• polyethylene_foam,
• field_generator,
• boot,
• laundry-detergent_jug,
• saucepan,
• scrap_leather,
• bookcase,
• flathead_screwdriver,
• java_fern,
• brass,
• foam_board,
• diamond,
• cloth_bag,
• low_bench,
• zinc,
• armoire,
• polyester,
• graphite,
• room_corner,
• manila,
• closet_pole,
• ice_auger,
• neoprene_boot,
• evergreen,
• styrofoam_block,
• gingham,
• roads,
• granite_table,
• garden_phlox,
• similar_structure,
• gazebo,
• linen,
• nonslip_runner,
• enamel_paint,
• titanium,
• interior_room,
• step,
• radicchio,
• tote,
• iron_skillet,
• leather_material,
• aluminium,
• dill,
• overall,
• gabardine,
• sport_shoes,
• counter_top,
• cover_toe,
• bed,
• whisky_barrel,
• frame,
• soup_pot,
• leather_boot,
• wooden_workbench,
• crate,
• thyme,
• cement,
• corrugated_metal,
• silver,
• silicon,
• masonite_panel,
• old_clothing,
• trailer_hitch,
• bucket,
• post,
• metal_pole,
• paper,
• vehicle,
• terra-cotta_planter,
• wooden_box,
• bamboo,
• basement,
• poplin,
• vinyl_sheeting,
• rubber,
• staircase,
• alabaster,
• cast_aluminum,
• hexagonal_brass,
• cardboard_box,
• floral_sheeting,
• pothos,
• stone_patio,
• high_beam,
• carpeted_floor,
• carbon_fiber,
• cabinet,
• fruit,
• side,
• spoon_excavator,
• corrugated_cardboard,
• canvas,
• heavy_cardboard,
• marjoram,
• hyena,
• table_works,
• fence,
• iceberg,
• pail,
• old_sneaker,
• parsley,
• pill_jar,
• marble,
• coat,
• posterboard,
• cotton_duck,
• juniper,
• lion,
• walking_boot,
• bumper,
• metal,
• escarole,
• small_box,
• stretcher,
• shoes,
• cranial_base,
• sage,
• wild_dog,
• precast_concrete,
• stuffed_fabric,
• various_bed,
• pillbox,
• iron,
• micro_suede,
• endive,
• railing,
• nylon,
• chrome,
• shrub,
• cedar,
• suitcase,
• walnut,
• walking_shoes,
• cardboard,
• film_canister,
• box,
• margarine_tub,
• canoe,
• polyvinyl-chloride_pvc,
• magnesium,
• vehicle_body,
• heavy_cotton,
• film,
• sneaker,
• vase,
• aluminum,
• light_pole,
• suede,
• gold,
• upholstery_fabric,
• tin,
• metal_table,
• broadcloth,
• anvil,
• board_book,
• low_table,
• twisted_paper,
• furniture,
• brace,
• underwear,
• birch,
• strong_doorway,
• maple,
• pvc,
• oregano,
• roof,
• floor_paint,
• workstation,
• farm_equipment,
• steamer_connection,
• pewter,
• cover,
• window_sill,
• craft_stick,
• jewel_box,
• floor,
• thick_cotton,
• mahogany_wood,
• acetate,
• carbon,
• boat,
• diesel-engine_framework,
• pecan,
• cryptocoryne_plant,
• specialty_steel,
• sidewalk,
• sheet_rock,
• screw_driver,
• tree,
• plastic_jug,
• machine,
• hickory,
• hemp,
• counter,
• exterior,
• burlap,
• painter_stirrer,
• stool,
• grill_pan,
• shelf_unit,
• bulletproof_vest,
• orthopedic_shoes,
• wall_brace,
• wicker,
• shoe_box,
• acrylic,
• pole,
• sailcloth,
• tripod,
• plastic_sheeting,
• bronze,
• tarragon,
• jiujitsu_uniform,
• faux_leather,
• garage_floor,
• plastic_plate,
• day_pack,
• table_top,
• butcher-block_table,
• battery,
• transparent_acrylic,
• cherry,
• nylon_webbing,
• seat,
• leather,
• ground,
• heavy_chair,
• building,
• lavender,
• fence_post,
• rainproof_shed,
• paint,
• jean,
• pin_cushion,
• yogurt_container,
• quilted_cotton,
• bus-stop_shelter,
• duck,
• large_rock,
• towel,
• mat_board,
• barn,
• chair,
• straw,
• oak,
• gym_bag,
• platinum,
• old_table,
• deck_leg,
• special_container,
• strong_fence,
• sidewalk_panel,
• rock,
• duck_cloth,
• ash,
• backpack,
• black_plexiglas,
• cotton,
• tub,
• titanium_nitride,
• woven_cotton,
• stone,
• metal_comb,
• asphalt,
• dacron,
• basket,
• runner,
• glass,
• sheet_steel,
• sunflower,
• rubber_bucket,