Modifiers matching contamination:

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

Simple categories matching heavier:

• fabric,
• alcohol,
• material,
• thing,
• needle,
• isotope,
• metal,
• container,
• industry,
• work,
• stain,
• electron,
• atom,
• item,
• alkane,
• vehicle,
• meson,
• waste,
• fare,
• piece,
• machine,
• solid,
• sediment,
• fixture,
• fish,
• cake,
• meal,
• vegetable,
• particle,
• wood,
• implement,
• linen,
• camera,
• tool,
• fraction,
• sawdust,
• fuel,
• activity,
• textile,
• component,
• load,
• bird,
• music,
• dirtiness,
• mineral,
• dish,
• thread,
• deposit,
• tm,
• pasta,
• liquid,
• unit,
• decoration,
• contaminant,
• substrate,
• equipment,
• volatile,
• substance,
• scent,
• rock,
• weaponry,
• source,
• knit,
• fluid,
• halogen,
• constituent,
• weapon,
• soil,
• pellet,
• arms,
• elements,
• grain,
• agent,
• food,
• plant,
• aggregate,
• compound,
• stuff,
• surface,
• hardwood,
• leaf,
• commodity,
• paint,
• element,
• chemical,
• meat,
• alloy,
• article,
• gear,
• hydrocarbon,
• order,
• clothes,
• machinery,
• bread,
• contamination,
• residue,
• paper,
• stock,
• gas,
• job,
• aircraft,
• clothing,
• congener,
• fastener,
• filament,
• ball,
• part,
• armament,
• ion,
• papers,
• glove,
• post,
• impurity,
• package,
• conductor,
• car,
• garment,
• medium,
• system,
• furniture,
• lepton,
• body,
• utensil,
• artifact,
• style,
• instrument,
• product,
• hadron,
• foundation,
• fibre,
• object,
• footwear,
• construction,
• mixture,
• line,
• transport,
• sport,
• ship,
• sweetener,
• structure,
• area,
• distillate,