Modifiers matching allergen:

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

Simple categories matching harmless:

• substance,
• disorder,
• animal,
• organism,
• antigen,
• component,
• impurity,
• prey,
• neighbor,
• thing,
• material,
• residue,
• critter,
• creature,
• salt,
• crime,
• metal,
• being,
• agent,
• contaminant,
• bird,
• medication,
• liquid,
• ingredient,
• object,
• compound,
• stuff,
• gas,
• allergen,
• insect,
• fluid,
• task,
• chemical,
• foodstuff,
• item,
• snake,
• metabolite,
• food,
• sugar,
• preservative,
• carrier,
• preparation,
• spider,
• plant,
• particle,
• powder,
• drug,
• constituent,
• matter,
• bug,
• souvenir,
• pollutant,
• activity,
• solid,
• rodent,