Simple categories matching thicker:

• papers,
• material,
• fabric,
• part,
• card,
• muscle,
• medium,
• feed,
• article,
• fluid,
• substance,
• document,
• pipe,
• mixture,
• sheet,
• piece,
• lubricant,
• fibre,
• bedclothes,
• wrap,
• paint,
• product,
• jacket,
• batter,
• clothing,
• coating,
• oil,
• original,
• leather,
• paper,
• cord,
• foam,
• cloth,
• liquid,

Members with property thicker:

• book,
• corrugated_cardboard,
• wool,
• copper,
• lard,
• calf,
• down_jacket,
• grease,
• wood,
• denim,
• polyester,
• photo_paper,
• fleece,
• optical_card,
• cardboard,
• textile_paint,
• oil,
• aluminum,
• aluminium,
• mucus,
• straw,
• molasses,
• chenille,
• chunky_knit,
• plan,
• clay,
• crisp_cotton,
• slurry,
• metal,
• canvas,
• card_stock,
• product_packaging,
• adhesive,
• silicone,
• silver,
• baby_terry,
• magnesium,
• sweatshirt,
• acrylic,
• paper,
• label_paper,
• ic_card,
• twill,
• cowhide,
• washed_cotton,
• polar_fleece,
• seed,
• body_wax,
• pulpy_juice,
• thicker_conditioner,
• pate,
• smoothie,
• skin,
• cotton,
• burlap,
• cushion,
• packaging,
• bristol_vellum,
• milk,
• warped_material,
• cork,
• household_glove,
• goat_hair,
• bedspread,
• tweed,
• sun_oil,
• sweatpants,
• watercolour_paper,
• hemp,
• wood_glue,
• muffin_batter,
• butter,
• shirting,
• polystyrene_foam,
• lightweight_linen,
• door_handle,
• coat,
• jean,
• gel,
• egg,
• homemade_papers,
• engine_oil,
• fabric,
• soy_milk,
• calico,
• winter_clothing,
• stretched_canvas,
• card,
• tile,
• magazine,
• silk,
• heavy_paper,
• glass_marbles,
• gift_card,
• windcheater_material,
• leather_cord,
• emulsion,
• sheet_material,
• heavy_jersey,
• sheet_steel,
• bile,
• ointment,
• dvd_case,
• wing_spar,
• stone,
• mat_board,
• bench_shirt,
• work_glove,
• brass,
• black_coating,
• sole_leather,
• woollen_cloth,
• watercolor_paper,
• breast_milk,
• envelope,
• passbook,
• tile_paint,
• wax,
• pillow_wrap,
• wood_veneer,
• paint,
• cord,
• leather,
• fun_foam,
• cereal,
• map,
• curtain_fabric,
• joint_compound,
• resin,
• masonry_paint,
• pillow,
• veg_oil,
• watercolor,
• quilt,
• corduroy,
• polyurethane,
• double,
• woollen_fabric,
• old_towel,
• batter,
• reflective_material,
• terrycloth,
• battle-dress_overgarment,
• steering-wheel_chrome,
• catalogue,
• gastrocnemius,
• cambric,
• leather_jacket,
• silks,
• satin,
• handle,
• felt,
• khadi_silk,
• sign_foam,
• jacket,
• sheet_rock,
• thick_linen,
• squat_shorts,
• soleus,
• sewer_pipe,
• steel,
• flux,
• soup,
• foam,
• acoustic_foam,
• gloss,
• stiff_silks,
• rubber,
• epoxy,
• chart,
• granite,
• sealant,
• postcard_stock,
• silkscreen_cloth,
• carpet_foam,
• thicker_paper,
• juice,
• velvet,
• leathery_armor,
• elk_hide,
• composition_material,
• faux_silks,