Modifiers matching antigen:

• exogenous,
• free,
• innocuous,
• internal,
• foreign,
• perennial,
• strong,
• outside,
• possible,
• single,
• oral,
• harmless,
• noninfectious,
• dangerous,
• environmental,
• active,
• bacterial,
• soluble,
• infectious,
• simple,
• viral,
• extrinsic,
• endogenous,
• nutritional,
• proteinaceous,
• peripheral,
• main,
• indoor,
• small,
• microbial,
• harmful,
• extraneous,
• outdoor,
• particulate,
• diverse,
• several,
• lethal,

Simple categories matching environmental:

• stimulus,
• disaster,
• condition,
• hydraulics,
• surface,
• cue,
• incident,
• stress,
• hazard,
• illness,
• analysis,
• sensitivity,
• contaminant,
• data,
• event,
• object,
• use,
• odor,
• tolerance,
• activity,
• effort,
• item,
• footprint,
• issue,
• form,
• task,
• matter,
• audio,
• quality,
• heritage,
• change,
• tissue,
• clue,
• catastrophe,
• installation,
• level,
• coating,
• aspect,
• requirement,
• challenge,
• antigen,
• interaction,
• input,
• simulation,
• subject,
• professional,
• deed,
• consequence,
• gas,
• commodity,
• goal,
• allergen,
• grouping,
• torque,
• measurement,
• time,
• debris,
• flow,
• works,
• group,
• management,
• improvement,
• expense,
• specialist,
• values,
• benefit,
• therapy,
• standard,
• meeting,
• fee,
• fabric,
• specialty,
• stewardship,
• predator,
• stuff,
• variable,
• process,
• solid,
• conservation,
• sample,
• division,
• politics,
• difficulty,
• fomite,
• carcinogen,
• harm,
• scheme,
• protection,
• problem,
• matrix,
• game,
• institution,
• service,
• entity,
• detector,
• plan,
• tool,
• efficiency,
• report,
• mineral,
• trait,
• testing,
• toxin,
• print,
• pollution,
• regulation,
• topic,
• feature,
• commitment,
• factor,
• initiative,
• agent,
• arrangement,
• force,
• treasure,
• education,
• infrastructure,
• unit,
• text,
• location,
• structure,
• compound,
• pressure,
• tension,
• company,
• occurrence,
• indicator,
• resistance,
• odour,
• bacteria,
• toxicology,
• resource,
• scan,
• threat,
• expert,
• interference,
• liquid,
• constraint,
• user,
• cleaning,
• niche,
• property,
• advisor,
• output,
• obstacle,
• pickup,
• pathogen,
• disorder,
• employment,
• product,
• sampling,
• disease,
• test,
• streptococcus,
• circumstances,
• security,
• signal,
• action,
• component,
• project,
• damage,
• asset,
• law,
• document,
• behavior,
• fixture,
• performance,
• space,
• mixture,
• catalysis,
• body,
• substrate,
• situation,
• noise,
• attack,
• insult,
• danger,
• alteration,
• pest,
• stimulation,
• stressor,
• pollutant,
• ligand,
• idea,
• elements,
• discipline,
• effect,
• layer,
• organism,
• impact,
• adaptation,
• shift,
• limitation,
• scientist,
• organisation,
• material,
• science,
• agency,
• ngo,
• conflict,
• health,
• microbe,
• directive,
• muffler,
• profession,
• support,
• recovery,
• selection,
• characteristic,
• touch,
• preservation,
• experience,
• work,
• device,
• weather,
• message,
• job,
• utility,
• poison,
• program,
• review,
• influence,
• designer,
• thought,
• dynamics,
• knowledge,
• exposure,
• water,
• catalyst,
• fluid,
• waste,
• policy,
• light,
• state,
• measure,
• fuel,
• system,
• agreement,
• economist,
• impurity,
• piece,
• point,
• sensation,
• gradient,
• contact,
• statute,
• technology,
• fact,
• calamity,
• sustainability,
• duty,
• chemistry,
• enhancement,
• assay,
• disturbance,
• communication,
• whole,
• barrier,
• region,
• substance,
• information,
• degradation,
• attribute,
• instrument,
• discomfort,
• investigation,
• theme,
• variation,
• cd,
• practice,
• parameter,
• organization,
• design,
• stone,
• perturbation,
• sensor,
• consideration,
• sound,
• phenomenon,
• consultant,
• repair,
• facility,
• modification,
• malady,
• development,
• dimension,
• reservoir,
• movement,
• tragedy,
• zone,
• rehabilitation,
• engineering,
• industry,
• microorganism,
• metal,
• model,
• status,
• trouble,
• toxicant,
• trauma,
• study,
• source,
• hepatotoxin,
• difference,
• power,
• scene,
• constituent,
• care,
• educator,
• cause,
• marker,
• control,
• painting,
• biotechnology,
• concentration,
• belief,
• field,
• obstruction,
• chemical,
• machinery,
• failure,
• medium,
• cost,
• fluctuation,
• area,
• aggression,
• technique,
• receptor,
• contamination,
• injury,
• assets,
• business,
• tax,
• equipment,
• thing,