Modifiers matching impurity:

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

Simple categories matching biological:

• process,
• insulator,
• artifact,
• structure,
• material,
• fluid,
• residue,
• phase,
• coating,
• glue,
• molecule,
• science,
• adhesive,
• terms,
• amine,
• cell,
• data,
• system,
• evolution,
• organism,
• damage,
• means,
• conduit,
• quantity,
• maturation,
• tissue,
• macromolecule,
• treatment,
• fertiliser,
• parameter,
• container,
• fertilizer,
• substance,
• vocation,
• fuel,
• duct,
• creature,
• level,
• function,
• character,
• preparation,
• infection,
• grouping,
• option,
• measure,
• description,
• poison,
• resource,
• improvement,
• issue,
• benefit,
• ingredient,
• vessel,
• arts,
• microorganism,
• community,
• medication,
• chemical,
• illness,
• agent,
• mineral,
• team,
• machinery,
• problem,
• thing,
• solid,
• organisation,
• integrity,
• scientist,
• development,
• complex,
• target,
• passageway,
• aggregate,
• property,
• testing,
• measurement,
• item,
• aspect,
• fibre,
• enzyme,
• research,
• form,
• limb,
• mixture,
• state,
• pest,
• analysis,
• organization,
• flow,
• space,
• abnormality,
• pesticide,
• result,
• cycle,
• appendage,
• irregularity,
• content,
• movement,
• magnitude,
• work,
• chemistry,
• interest,
• alcohol,
• pattern,
• reason,
• consequence,
• network,
• disposition,
• marker,
• operator,
• danger,
• entity,
• identification,
• variable,
• rhythm,
• unit,
• mechanism,
• member,
• matter,
• kin,
• frontier,
• behavior,
• individual,
• sector,
• project,
• compartment,
• motive,
• cofactor,
• motion,
• trauma,
• toxin,
• chamber,
• surroundings,
• offspring,
• activity,
• event,
• drug,
• protein,
• factor,
• area,
• element,
• environment,
• society,
• contamination,
• age,
• brain,
• consideration,
• sound,
• plant,
• buffer,
• concretion,
• sensor,
• solution,
• constituent,
• force,
• stress,
• profession,
• industry,
• shape,
• source,
• pigment,
• ligand,
• pathogen,
• signal,
• composition,
• activator,
• intervention,
• specimen,
• fibril,
• assembly,
• act,
• situation,
• noise,
• secretion,
• indicator,
• interaction,
• quality,
• carrier,
• task,
• effect,
• drive,
• action,
• catalyst,
• compound,
• anticoagulant,
• category,
• product,
• subject,
• notion,
• response,
• sample,
• complication,
• technology,
• group,
• relic,
• detector,
• therapy,
• processing,
• precursor,
• characteristic,
• machine,
• membrane,
• filament,
• gel,
• control,
• invasion,
• passage,
• behaviour,
• phenotype,
• stimulus,
• sludge,
• criterion,
• anion,
• boundary,
• particle,
• engineering,
• pathway,
• program,
• concept,
• significance,
• domain,
• organs,
• defect,
• origin,
• polymer,
• condition,
• topic,
• procedure,
• disorder,
• performance,
• disturbance,
• nutrient,
• ontology,
• waste,
• substrate,
• tendency,
• polysaccharide,
• study,
• sugar,
• swarm,
• field,
• application,
• part,
• species,
• information,
• assay,
• hazard,
• matrix,
• object,
• contaminant,
• medium,
• disease,
• trait,
• knowledge,
• test,
• evidence,
• variant,
• index,
• weapon,
• surface,
• assemblage,
• feature,
• particulate,
• lipid,
• relative,
• phenomenon,
• culture,
• variation,
• end,
• surfactant,
• world,
• sex,
• relationship,
• antioxidant,
• impurity,
• component,
• memory,
• difference,
• liquid,
• discipline,
• sequence,
• microbe,
• asymmetry,
• success,
• filter,
• inquiry,
• father,
• food,
• effector,
• constraint,
• necessity,
• body,
• stimulant,
• works,
• attribute,
• textile,
• modification,
• nature,
• parent,
• reservoir,
• diversity,
• cause,
• change,
• reaction,
• layer,
• times,
• fiber,