Modifiers matching impurity:

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

Simple categories matching suspended:

• matter,
• debris,
• sediment,
• solid,
• metal,
• object,
• organism,
• clay,
• material,
• conductor,
• slab,
• particle,
• sphere,
• constituent,
• substance,
• plant,
• contaminant,
• animal,
• impurity,
• particulate,
• part,
• mineral,
• utility,
• component,