Modifiers matching contamination:

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

Simple categories matching atmospheric:

• action,
• condition,
• sound,
• phenomenon,
• composition,
• property,
• aerosol,
• movement,
• gas,
• process,
• change,
• activity,
• circulation,
• characteristic,
• radiance,
• force,
• event,
• exposure,
• contamination,
• layer,
• effect,
• pressure,
• quality,
• component,
• state,
• electricity,
• instrument,
• track,
• input,
• topic,
• constituent,
• contaminant,
• motion,
• cyclone,
• quantity,
• pollution,
• impurity,
• boundary,
• region,
• particle,
• air,
• connection,
• debris,
• salt,
• precipitation,
• stuff,
• hazard,
• material,
• agent,
• variable,
• influence,
• control,
• temperature,
• wave,
• oxidizer,
• study,
• energy,
• aggregate,
• nitrogen,
• situation,
• surface,
• lifetime,
• science,
• storm,
• interference,
• atom,
• aspect,
• pollutant,
• weather,
• research,
• feature,
• deposit,
• issue,
• compound,
• substance,
• turbulence,
• molecule,
• evolution,
• discharge,
• oscillation,
• entity,
• elements,
• object,
• water,
• particulate,
• structure,
• disturbance,
• environment,
• medium,