Modifiers matching impurity:

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

Simple categories matching hazardous:

• feature,
• substance,
• creature,
• accident,
• material,
• tool,
• chemical,
• air,
• waste,
• action,
• aggregate,
• disease,
• metal,
• fumes,
• hazard,
• situation,
• nature,
• unit,
• fixture,
• item,
• food,
• behavior,
• light,
• explosive,
• event,
• location,
• business,
• thing,
• drinking,
• pursuit,
• compound,
• part,
• operations,
• choice,
• characteristic,
• surface,
• pollutant,
• site,
• installation,
• index,
• appliance,
• drug,
• condiment,
• matter,
• crossing,
• land,
• incident,
• preservative,
• technology,
• point,
• area,
• plant,
• place,
• machinery,
• structure,
• article,
• microorganism,
• job,
• machine,
• element,
• metabolite,
• object,
• scene,
• weather,
• contamination,
• condition,
• anion,
• fiber,
• solvent,
• enterprise,
• commodity,
• insecticide,
• herb,
• behaviour,
• precipitation,
• assignment,
• weapon,
• specimen,
• herbicide,
• liquid,
• pastime,
• abrasive,
• nitrile,
• particle,
• recreation,
• elements,
• sport,
• pesticide,
• bacteria,
• constituent,
• obstacle,
• circuit,
• solid,
• cargo,
• process,
• ingredient,
• system,
• motion,
• use,
• pollution,
• pathogen,
• formulation,
• service,
• attribute,
• atmosphere,
• contaminant,
• duty,
• sector,
• container,
• product,
• component,
• property,
• intermediate,
• reactant,
• halide,
• occupation,
• environment,
• room,
• terrain,
• organophosphate,
• gas,
• hydrocarbon,
• equipment,
• phenomenon,
• residue,
• fluid,
• industry,
• drink,
• activity,
• propellant,
• ground,
• agent,
• pattern,
• salt,
• body,
• oxidant,
• particulate,
• impurity,
• program,
• animal,
• task,
• beverage,
• facility,
• organism,
• work,
• region,
• obstruction,
• fuel,
• meat,
• microbe,
• employment,
• occurrence,
• space,