Modifiers matching allergen:

• harmless,
• home,
• airborne,
• common,
• natural,
• indoor,
• unhealthy,
• large,
• environmental,
• typical,
• outside,
• american,
• out,
• outdoor,
• important,
• microscopic,
• rare,
• potential,
• seasonal,
• individual,
• active,
• allergic,
• systemic,
• possible,
• special,
• relevant,
• single,
• familiar,
• particular,
• reactive,
• dietary,
• respiratory,
• new,
• harmful,
• major,
• unique,
• cereal,
• strong,
• perennial,
• nasty,
• additional,
• identifiable,
• cutaneous,
• size,
• fine,
• organic,
• inhalant,
• animal,

Simple categories matching possible:

• ingredient,
• cause,
• incident,
• infection,
• piece,
• pathogen,
• assistant,
• contaminant,
• condition,
• acid,
• symptom,
• procedure,
• catastrophe,
• use,
• activity,
• area,
• fluid,
• means,
• disease,
• nexus,
• information,
• error,
• eruption,
• toxin,
• complication,
• entertainment,
• disturbance,
• modification,
• material,
• organism,
• inflammation,
• comfort,
• way,
• disorder,
• list,
• change,
• form,
• process,
• predator,
• emotion,
• animal,
• development,
• layer,
• impurity,
• antigen,
• illness,
• prey,
• problem,
• residue,
• situation,
• germ,
• fuel,
• group,
• place,
• occurrence,
• indication,
• extra,
• market,
• precipitant,
• virus,
• morbidity,
• event,
• parasite,
• work,
• state,
• protease,
• mechanism,
• accident,
• opposition,
• target,
• interaction,
• lesion,
• theme,
• injury,
• system,
• failure,
• sector,
• pathology,
• disaster,
• bacteria,
• pollutant,
• motion,
• thing,
• chemical,
• contamination,
• allergen,
• usage,
• feature,
• solution,
• entity,
• specification,
• sport,
• transformation,
• sentence,
• hazard,
• surface,
• intermediate,
• danger,
• artifact,
• equipment,
• syndrome,
• substrate,
• evidence,
• poison,
• action,
• abrasive,
• precursor,
• service,
• volatile,
• substance,
• request,
• difficulty,
• defect,
• reaction,
• catalyst,
• career,
• facility,
• agent,
• toxicant,
• malady,
• conflict,
• rodent,
• metal,