Modifiers matching contamination:

• fragile,
• internal,
• airborne,
• external,
• common,
• soft,
• heavier,
• environmental,
• alkaline,
• loose,
• extraneous,
• particulate,
• deleterious,
• organic,
• molecular,
• inorganic,
• unwanted,
• gross,
• biological,
• nonpolar,
• volatile,
• solid,
• fecal,
• up,
• fluid,
• physical,
• charged,
• light,
• visible,
• incidental,
• salt,
• industrial,
• chemical,
• microbial,
• insoluble,
• residual,
• heavy,
• interfering,
• undesired,
• liquid,
• hazardous,
• possible,
• regular,
• colloidal,
• polar,
• penetrating,
• potential,
• harmful,
• overhead,
• cross,
• natural,
• basic,
• active,
• hydrophilic,
• atmospheric,
• metallic,
• toxic,
• off,
• foreign,
• irritating,
• inert,
• metal,
• regulated,
• high,
• gaseous,
• animal,
• minor,

Simple categories matching particulate:

• fuel,
• material,
• sulfate,
• matter,
• carrier,
• object,
• abrasive,
• organism,
• metal,
• ingredient,
• magnetite,
• system,
• deposit,
• solid,
• nature,
• composition,
• filler,
• specimen,
• soil,
• product,
• pollution,
• impurity,
• component,
• contaminant,
• contamination,
• substance,
• inclusion,
• pollutant,
• marker,
• oxide,
• polymer,
• process,
• sorbent,
• property,
• suspension,
• characteristic,
• entity,
• conductor,
• fiber,
• coal,
• application,
• cereal,
• food,
• waste,
• substrate,
• filter,
• measure,
• chromium,
• chemical,
• fraction,
• shape,
• mineral,
• polymerization,
• artifact,
• structure,
• evidence,
• dielectric,
• compound,
• binder,
• carcinogen,
• medium,
• weather,
• form,
• measurement,
• antigen,
• cheese,
• layer,
• particle,
• slurry,
• beverage,
• surface,
• foodstuff,
• agent,
• residue,