Simple categories matching noncombustible:

• contaminant,
• material,
• liquid,
• waste,
• particle,
• siding,
• matter,
• substance,
• gas,
• fluid,
• fiber,
• surface,
• wall,
• medium,
• item,
• trash,
• tube,
• constituent,

Members with property noncombustible:

• helium,
• argon,
• paper,
• cardboard,
• fiber_cement,
• metal,
• carbon-dioxide_co2,
• wet_sand,
• stone,
• vermiculite,
• large_appliance,
• metal_oxide,
• h2o,
• sand,
• asbestos_millboard,
• bedding,
• grout,
• drywall,
• freon,
• hardwood_board,
• masonry_corridor,
• hearth_pad,
• steel_sheet,
• limestone,
• wood,
• steel,
• soil,
• earth,
• oxygen,
• appliance,
• co2,
• clay,
• rock,
• glass_bottle,
• tin,
• vermiculite_sand,
• tile,
• cement,
• garbage,
• gypsum,
• slate,
• carbon-dioxide_gas,
• stucco,
• steel_alloy,
• pad,
• cigarette_cardboard,
• kaolin,
• water,
• shale,
• patio,
• garden_debris,
• cement_plaster,
• dolomite,
• certain_metal,
• spatula,
• dirt,
• silica,
• polyethylene_granule,
• talc,
• gravel,
• similar_material,
• concrete,
• brush,
• glass,
• ground,
• rock_gravel,
• glass_prior,
• air,
• trash,
• copper,
• inert_material,
• lumber_scrap,
• liquid,
• silicon-carbide_particle,
• asbestos,
• metal_tube,
• oil,
• dry_sand,
• towel,
• iron,
• neon,
• thorium,
• debris,
• sand_particle,
• ash,
• liquid_freon,
• cold_ash,
• plaster,
• masonry,
• yard_waste,
• grit,
• lignin,
• aluminum,
• metal_part,
• litter,
• cigarette,
• papers,
• cerium_compound,
• brick,
• sand_rock,
• tin-can_lid,
• protein,
• marble,
• nitrogen,
• asphalt,
• liquid_carbon,
• leaf,
• ornamental_iron,
• sheet_steel,
• perforated_sheet,
• ferrous_material,