Modifiers matching catastrophe:

• smaller,
• major,
• single,
• external,
• natural,
• violent,
• bad,
• environmental,
• random,
• sudden,
• powerful,
• dramatic,
• unnatural,
• widespread,
• terrible,
• related,
• domestic,
• political,
• massive,
• big,
• small,
• unforeseeable,
• geophysical,
• national,
• local,
• recent,
• individual,
• unforeseen,
• unpredictable,
• biblical,
• predictable,
• physical,
• unexpected,
• significant,
• localized,
• worldwide,
• cosmic,
• large,
• past,
• nuclear,
• real,
• world,
• infrequent,
• possible,
• weather,
• regional,
• horrible,
• economic,
• wide,
• humanitarian,
• devastating,
• temporary,
• periodic,
• specified,
• extraordinary,
• extreme,
• ecological,
• european,
• global,
• future,
• underlying,
• mental,
• climatic,
• astronomical,
• unavoidable,
• social,

Simple categories matching infrequent:

• symptom,
• process,
• fire,
• event,
• disturbance,
• expenditure,
• occurrence,
• episode,
• relationship,
• cause,
• hazard,
• activity,
• occasion,
• morbidity,
• catastrophe,
• movement,
• organelle,