Modifiers matching coal:

• rich,
• wet,
• hard,
• particulate,
• domestic,
• volatile,
• solid,
• bituminous,
• primary,

Simple categories matching wet:

• material,
• activity,
• equipment,
• area,
• plating,
• precipitation,
• cloth,
• location,
• ground,
• season,
• commodity,
• product,
• surface,
• coal,
• thing,
• item,
• space,
• room,
• fruit,
• laundry,
• years,
• job,
• photography,
• appliance,
• web,
• application,
• particle,
• fluid,
• ingredient,
• wood,
• clothing,
• food,
• process,
• land,
• stuff,
• month,
• precipitate,
• market,
• sealant,
• object,
• deposit,
• ecosystem,
• tissue,
• article,
• building,
• liquid,
• processing,
• mixture,
• composition,
• substance,
• cleaner,
• solid,
• facility,
• fabric,
• beverage,
• footwear,
• paste,
• air,
• brush,
• task,
• lubricant,
• floor,
• pollutant,
• prey,
• clothes,
• chemical,
• sludge,
• seed,
• occupation,
• grassland,
• residue,
• system,
• covering,
• medium,
• matter,
• entertainment,
• period,
• waste,
• paper,
• weather,
• component,
• dish,
• structure,
• concrete,
• year,
• situation,
• discipline,
• feed,
• works,
• game,
• fly,
• trade,
• coating,
• sweetmeat,
• condiment,
• acid,
• climate,
• installation,
• cover,
• condition,
• atmosphere,
• soil,
• substrate,
• vegetable,
• craft,
• organs,
• metal,
• place,
• fuel,
• fitting,
• environment,
• site,
• treatment,
• sediment,
• pulp,
• form,
• fibre,
• mammal,
• work,
• leaf,