Modifiers matching impurity:

• airborne,
• micro,
• physical,
• natural,
• desirable,
• anionic,
• little,
• microscopic,
• common,
• lightweight,
• absorptive,
• volatile,
• homogeneous,
• coarse,
• mechanical,
• insoluble,
• active,
• small,
• sticky,
• environmental,
• separate,
• unavoidable,
• dilute,
• mental,
• harmless,
• residual,
• light,
• gaseous,
• dissolved,
• possible,
• biological,
• organic,
• atmospheric,
• fluid,
• colloidal,
• out,
• solid,
• heavier,
• ordinary,
• stubborn,
• suspended,
• interfering,
• off,
• heterogeneous,
• unwanted,
• lighter,
• minor,
• initial,
• mobile,
• undesired,
• ionic,
• hazardous,
• particulate,
• inorganic,
• damaging,
• reactive,
• soluble,
• chemical,
• foreign,
• fine,
• corrosive,
• nonpolar,
• up,
• harmful,
• polar,
• smaller,
• visible,
• minute,
• random,

Simple categories matching reactive:

• battery,
• particle,
• metal,
• group,
• adhesive,
• rock,
• mixture,
• material,
• fluid,
• attitude,
• protein,
• agent,
• gas,
• chemical,
• cell,
• concern,
• carbohydrate,
• product,
• component,
• change,
• derivative,
• compound,
• aldehyde,
• substance,
• atmosphere,
• entity,
• monomer,
• constituent,
• molecule,
• residue,
• emotion,
• object,
• mineral,
• foil,
• system,
• sorbent,
• portion,
• elements,
• state,
• alloy,
• problem,
• impurity,
• intermediate,
• anhydride,
• disease,
• sugar,
• solute,
• food,
• behavior,
• hydrocarbon,
• carbonyl,
• binder,
• allergen,
• radical,
• ingredient,
• metabolite,
• alkene,
• process,
• aggregate,
• coating,
• medium,
• sentiment,
• species,
• contaminant,
• atom,
• resin,
• complication,
• mechanism,
• precursor,
• element,
• fuel,
• solid,
• passion,
• diluent,
• olefin,
• surface,
• ketone,
• measure,
• oxide,
• paraffin,
• substrate,
• polymer,
• halide,
• experience,
• silicide,
• halogen,
• amine,
• waste,