Modifiers matching contamination:

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

Simple categories matching extraneous:

• matter,
• contamination,
• cell,
• line,
• material,
• sound,
• noisemaker,
• substance,
• chemical,
• software,
• cause,
• stimulus,
• hardware,
• movement,
• particle,
• tissue,
• marking,
• information,
• antigen,
• object,
• details,
• organism,
• fixture,
• event,
• support,
• factor,
• agent,
• component,
• device,
• gas,
• article,
• feature,
• channel,
• compound,
• solid,
• debris,
• electricity,
• influence,
• atmosphere,
• activity,
• symbol,
• file,
• metal,
• interference,
• radiation,
• source,
• difficulty,
• condition,
• means,
• detail,
• market,
• cooling,
• danger,
• body,
• thing,
• noise,
• character,
• light,
• variable,
• item,
• constituent,
• action,
• fluid,
• signal,
• structure,
• text,
• dna,
• belt,
• area,
• artifact,
• mineral,
• catalyst,
• equipment,
• contaminant,
• waste,
• grounds,
• part,
• stuff,
• force,
• constraint,
• devices,