Modifiers matching occurrence:

• superficial,
• rare,
• unforeseen,
• natural,
• geologic,
• unusual,
• undesirable,
• accidental,
• weather,
• happy,
• unexpected,
• dangerous,
• unpleasant,
• political,
• damaging,
• social,
• special,
• irregular,
• localised,
• unfortunate,
• sudden,
• unpredictable,
• periodic,
• commonplace,
• exceptional,
• possible,
• motivational,
• catastrophic,
• relevant,
• historical,
• internal,
• routine,
• disruptive,
• terrifying,
• planned,
• unplanned,
• negative,
• seasonal,
• inanimate,
• extraordinary,
• single,
• outdoor,
• astronomical,
• external,
• unlikely,
• neurologic,
• hazardous,
• environmental,
• traumatic,
• unforeseeable,
• benign,
• major,
• extreme,
• musical,
• interesting,
• unique,
• recent,
• spontaneous,
• awesome,
• disastrous,
• costly,
• cosmic,
• unanticipated,
• transient,
• medical,
• discrete,
• significant,
• operational,
• miscellaneous,
• unwanted,
• geographical,
• climatic,
• deadly,
• untoward,
• future,
• meaningful,
• severe,
• simple,
• stressful,
• temporary,
• random,
• local,
• dramatic,
• tragic,
• positive,
• physical,
• interactive,
• autonomic,
• uncertain,
• neurological,
• serious,
• devastating,
• abnormal,
• ordinary,
• normal,
• dynamic,
• deviant,
• strange,
• adverse,
• specified,
• unavoidable,
• outside,
• annual,
• violent,
• corporeal,
• infrequent,
• criminal,
• supernatural,
• exogenous,
• seismic,
• small,
• common,
• harmful,
• acoustic,
• organizational,
• everyday,
• elemental,
• odd,
• cataclysmic,

Simple categories matching harmful:

• element,
• chemical,
• activity,
• substance,
• deposit,
• weeds,
• material,
• filler,
• metal,
• herb,
• behaviour,
• experience,
• component,
• halogen,
• organism,
• illness,
• stimulus,
• treatment,
• gas,
• compound,
• curio,
• microorganism,
• bacteria,
• condition,
• act,
• article,
• parasite,
• contaminant,
• ingredient,
• residual,
• drug,
• result,
• content,
• creature,
• agent,
• solvent,
• behavior,
• conduct,
• procedure,
• frequency,
• bug,
• oxidant,
• commodity,
• radiation,
• antigen,
• fat,
• problem,
• industry,
• pollutant,
• alkaloid,
• notion,
• energy,
• defect,
• radical,
• disorder,
• pathogen,
• choice,
• light,
• phenomenon,
• abnormality,
• germ,
• diuretic,
• stress,
• molecule,
• occurrence,
• fumigant,
• program,
• emission,
• idea,
• arachnid,
• situation,
• fumes,
• aerosol,
• irradiation,
• liquid,
• stain,
• constituent,
• reactant,
• group,
• fraction,
• action,
• animal,
• cell,
• fauna,
• stuff,
• change,
• fiber,
• event,
• therapy,
• aggression,
• exposure,
• pesticide,
• plant,
• gene,
• toxin,
• property,
• insect,
• place,
• cause,
• volatile,
• atmosphere,
• weather,
• residue,
• intermediate,
• adulterant,
• information,
• food,
• matter,
• test,
• subsidy,
• fluid,
• process,
• practice,
• code,
• yeast,
• contamination,
• power,
• drinking,
• virus,
• predator,
• inhalant,
• sector,
• quality,
• habit,
• caterpillar,
• item,
• influence,
• salt,
• product,
• state,
• symptom,
• intruder,
• occupation,
• sediment,
• disease,
• work,
• factor,
• danger,
• entity,
• stimulant,
• service,
• mineral,
• tool,
• impurity,
• sport,
• circumstances,
• allergen,
• effect,
• solute,
• waste,
• infection,
• beverage,
• particle,
• trait,
• microbe,
• medication,
• environment,
• crime,
• fuel,
• invertebrate,
• utterance,
• addiction,
• deeds,
• fish,
• nutrient,
• flavoring,
• pest,
• sweetener,
• preservative,
• object,
• elements,
• intervention,
• email,
• software,
• ion,
• complication,
• pathology,
• tax,
• force,
• emotion,
• consequence,
• monomer,
• thing,