Modifiers matching contaminant:

• airborne,
• microscopic,
• outside,
• poisonous,
• harmful,
• off,
• undesirable,
• dissolved,
• nonmetallic,
• inorganic,
• nasty,
• environmental,
• biological,
• organic,
• external,
• tough,
• noxious,
• minute,
• common,
• light,
• small,
• gaseous,
• chemical,
• heavy,
• ferrous,
• industrial,
• solid,
• unbound,
• reactive,
• ionic,
• natural,
• finer,
• abundant,
• lightweight,
• polymeric,
• ordinary,
• inedible,
• insoluble,
• endogenous,
• hazardous,
• multiple,
• cationic,
• unacceptable,
• separate,
• local,
• fluid,
• fine,
• moving,
• invisible,
• granular,
• abrasive,
• liquid,
• ic,
• hydrophobic,
• minor,
• colloidal,
• stubborn,
• floating,
• toxic,
• gross,
• individual,
• usual,
• atmospheric,
• modern,
• combustible,
• unsightly,
• irritating,
• larger,
• related,
• surrounding,
• biologic,
• important,
• typical,
• difficult,
• oleophilic,
• dangerous,
• unpleasant,
• additional,
• potential,
• nonpolar,
• exogenous,
• synthetic,
• semisolid,
• indoor,
• concrete,
• polar,
• soluble,
• acidic,
• structural,
• non-metallic,
• everyday,
• stable,
• critical,
• traditional,
• unseen,
• smaller,
• slippery,
• radiological,
• diverse,
• major,
• visible,
• sticky,
• magnetic,
• caustic,
• animal,
• ambient,
• lipophilic,
• foreign,
• noninfectious,
• carbonaceous,
• coarse,
• first,
• elemental,
• radioactive,
• deadly,
• microbial,
• conservative,
• oily,
• harmless,
• agricultural,
• conventional,
• passive,
• intracellular,
• large,
• heavier,
• fibrous,
• energetic,
• up,
• urban,
• alkaline,
• noncombustible,
• model,
• incidental,
• molecular,
• domestic,
• dermal,
• active,
• waterborne,
• undesired,
• corrosive,
• level,
• basic,
• carcinogenic,
• physical,
• persistent,
• familiar,
• soft,
• mobile,
• regulated,
• unusual,
• residual,
• damaging,
• anionic,
• numerous,
• out,
• biodegradable,
• detrimental,
• extraneous,
• unique,
• volatile,
• anthropogenic,
• suspended,
• salt,
• experimental,
• harsh,
• ferromagnetic,
• pure,
• aqueous,
• lighter,
• accidental,
• deleterious,
• world,
• hydrophilic,
• mechanical,
• interfering,
• unwanted,
• outdoor,
• loose,
• dense,
• single,
• opaque,
• miscellaneous,
• excessive,
• dry,
• particulate,
• viscous,
• size,
• greasy,
• possible,
• refractory,
• unhealthy,
• removable,
• key,
• hard,
• siliceous,
• metallic,
• unexpected,
• mental,
• new,
• over,
• meteorological,
• charged,
• conductive,
• metal,
• secondary,
• several,
• clean,
• dietary,

Simple categories matching gaseous:

• mass,
• form,
• chemical,
• fuel,
• hydrocarbon,
• compound,
• substance,
• constituent,
• monomer,
• anesthetic,
• oxide,
• acid,
• odor,
• fluid,
• object,
• carrier,
• agent,
• reactant,
• pollutant,
• atmosphere,
• material,
• contaminant,
• fumigant,
• phenomenon,
• buffer,
• mixture,
• component,
• alkyne,
• medium,
• waste,
• system,
• olefin,
• substrate,
• flow,
• cyanide,
• precursor,
• impurity,
• alkane,
• sulphide,
• state,
• matter,
• molecule,
• plasma,
• contamination,
• body,
• salt,
• anaesthetic,