Modifiers matching allergen:

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

Simple categories matching airborne:

• aldehyde,
• chemical,
• contaminant,
• particle,
• insect,
• seed,
• vessel,
• substance,
• disease,
• trauma,
• hydrocarbon,
• microorganism,
• material,
• conveyance,
• system,
• metal,
• sensor,
• image,
• compound,
• item,
• allergen,
• particulate,
• contamination,
• toy,
• pollutant,
• pollution,
• germ,
• waste,
• unit,
• debris,
• pest,
• fiber,
• device,
• gas,
• impurity,
• matter,
• bug,
• agent,
• abrasive,
• object,
• infection,
• creature,
• sound,
• organism,
• predator,
• craft,
• component,
• constituent,
• illness,
• armament,
• animal,
• condition,
• contagion,
• virus,
• feeder,
• pm,
• event,
• vehicle,
• platform,
• thing,
• dust,
• pathogen,
• prey,
• aerosol,
• hazard,
• medium,
• bacteria,