Modifiers matching coating:

• frictional,
• external,
• protective,
• abrasive,
• organic,
• supplementary,
• modern,
• friendly,
• reflective,
• nonconductive,
• popular,
• alternative,
• appropriate,
• liquid,
• decorative,
• nonmagnetic,
• reactive,
• thick,
• plastic,
• specified,
• special,
• synthetic,
• traditional,
• polymeric,
• opaque,
• top,
• clear,
• nonmetallic,
• corrosive,
• nonstructural,
• unwanted,
• outer,
• industrial,
• over,
• optical,
• preservative,
• stubborn,
• bituminous,
• secondary,
• thermoplastic,
• hard,
• internal,
• difficult,
• base,
• metallic,
• impervious,
• smooth,
• overlying,
• fine,
• marine,
• colored,
• expensive,
• durable,
• solid,
• impermeable,
• biological,
• waterproof,
• common,
• relevant,
• optional,
• ordinary,
• refractory,
• suitable,
• visible,
• specialized,
• architectural,
• functional,
• inorganic,
• advanced,
• magnetic,
• new,
• old,
• environmental,
• interior,
• additional,
• wet,
• porous,
• natural,
• resistant,
• metal,
• glossy,
• uniform,
• tough,
• thicker,
• aesthetic,
• permanent,
• thin,
• insoluble,
• pearlescent,
• slippery,
• fragile,
• conductive,
• heavy,
• nontoxic,
• black,
• sensitive,
• ceramic,
• loose,
• brittle,
• indoor,
• viscous,
• dark,
• soft,
• hydrophilic,
• chemical,
• standard,
• miscellaneous,
• conventional,
• topical,
• color,
• transparent,
• temporary,
• exterior,

Simple categories matching opaque:

• material,
• adhesive,
• fiber,
• object,
• foodstuff,
• surface,
• fluid,
• gemstone,
• item,
• sheet,
• filler,
• component,
• cell,
• oxide,
• stone,
• container,
• matrix,
• body,
• pigment,
• powder,
• rock,
• plastic,
• matter,
• ingredient,
• copy,
• metal,
• substrate,
• conductor,
• language,
• fence,
• coating,
• part,
• sack,
• substance,
• system,
• content,
• imperfection,
• gem,
• particle,
• document,
• obstacle,
• image,
• medium,
• fabric,
• mineral,
• sunscreen,
• article,
• mark,
• paper,
• liquid,
• ink,
• beverage,
• solid,
• tissue,
• creature,
• barrier,
• layer,
• bag,
• symbol,
• picture,
• glass,
• original,
• web,
• film,
• paint,
• product,
• aggregate,
• contaminant,
• assembly,
• structure,
• obstruction,