Modifiers matching clay:

• compressible,
• ordinary,
• active,
• natural,
• plastic,
• colloidal,
• powdered,
• pure,
• common,
• dry,
• metal,
• hard,
• commercial,
• valuable,
• suspended,
• refractory,
• siliceous,
• aluminous,
• precious,
• inorganic,
• special,
• charged,
• conductive,
• ceramic,
• white,
• heavy,
• sensitive,

Simple categories matching refractory:

• molecule,
• nitride,
• conductor,
• material,
• metal,
• particle,
• item,
• matter,
• compound,
• oxide,
• vessel,
• fibre,
• powder,
• mineral,
• filling,
• property,
• silicide,
• element,
• brick,
• nonmetal,
• shield,
• substance,
• wire,
• article,
• aggregate,
• constituent,
• shape,
• grain,
• lining,
• coating,
• contaminant,
• component,
• part,
• membrane,
• carrier,
• macromolecule,
• earth,
• carbide,
• filler,
• solid,
• surface,
• complex,
• clay,
• rock,
• fiber,
• ore,
• elements,
• fabric,
• residue,
• fraction,
• system,
• substrate,
• body,
• cement,
• alloy,
• medium,
• phosphate,
• product,