Modifiers matching occurrence:

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

Simple categories matching operational:

• group,
• necessity,
• agreement,
• equipment,
• activity,
• user,
• unit,
• concept,
• expense,
• tool,
• control,
• focus,
• material,
• status,
• system,
• waste,
• situation,
• personnel,
• procedure,
• organisation,
• guidance,
• entity,
• problem,
• error,
• inspection,
• organization,
• duty,
• specification,
• criterion,
• information,
• failure,
• measure,
• success,
• process,
• feature,
• region,
• gauge,
• accident,
• committee,
• attribute,
• aid,
• resource,
• interruption,
• issue,
• guideline,
• project,
• base,
• disruption,
• point,
• section,
• instructions,
• skill,
• use,
• report,
• temperature,
• employee,
• choice,
• improvement,
• line,
• aspect,
• capability,
• steps,
• product,
• readiness,
• means,
• mission,
• occurrence,
• management,
• decision,
• work,
• service,
• upset,
• business,
• dealings,
• knowledge,
• expenditure,
• button,
• team,
• discharge,
• solution,
• assembly,
• command,
• budget,
• deviation,
• behaviour,
• support,
• level,
• details,
• behavior,
• item,
• connection,
• institution,
• constraint,
• interference,
• building,
• risk,
• structure,
• innovation,
• application,
• efficiency,
• goal,
• cost,
• circumstances,
• company,
• discipline,
• description,
• device,
• program,
• layer,
• function,
• action,
• assistance,
• indicator,
• document,
• spacecraft,
• area,
• characteristic,
• mechanism,
• department,
• arrangement,
• effort,
• practice,
• limitation,
• opening,
• agency,
• state,
• incident,
• vehicle,
• stuff,
• role,
• notice,
• office,
• outcome,
• restriction,
• schedule,
• cluster,
• symbol,
• strategy,
• environment,
• part,
• domain,
• theme,
• change,
• job,
• component,
• task,
• variation,
• variable,
• requirement,
• audit,
• supply,
• craft,
• sound,
• body,
• force,
• zone,
• data,
• mode,
• policy,
• mirror,
• input,
• sensor,
• plan,
• parameter,
• server,
• cycle,
• nature,
• performance,
• ratio,
• consideration,
• staff,
• facility,
• modification,
• aircraft,
• proposition,
• figure,
• quality,
• thing,
• record,
• setting,
• liabilities,
• equation,
• property,
• experience,
• topic,
• condition,
• impact,
• assets,
• matter,
• cooperation,
• works,
• challenge,
• testing,
• difficulty,
• site,
• sector,
• event,
• phenomenon,
• method,
• person,