Modifiers matching accident:

• nuclear,
• violent,
• harsh,
• serious,
• historical,
• significant,
• natural,
• isolated,
• lethal,
• industrial,
• related,
• electric,
• marine,
• major,
• secondary,
• traumatic,
• everyday,
• conventional,
• shocking,
• common,
• civil,
• future,
• personal,
• bad,
• internal,
• military,
• catastrophic,
• preventable,
• minor,
• tragic,
• technological,
• unexpected,
• unfortunate,
• disastrous,
• severe,
• vehicular,
• external,
• simple,
• unpredictable,
• massive,
• supporting,
• unusual,
• dramatic,
• mechanical,
• interior,
• random,
• unintentional,
• sudden,
• genetic,
• neurologic,
• maritime,
• physical,
• fatal,
• dangerous,
• single,
• terrible,
• cerebral,
• operational,
• working,
• electrical,
• cerebrovascular,
• previous,
• uncommon,
• small,
• possible,
• unforeseen,
• agricultural,
• medical,
• vascular,
• hazardous,
• big,

Simple categories matching unpredictable:

• situation,
• event,
• sound,
• problem,
• catastrophe,
• disturbance,
• system,
• break,
• accident,
• disruption,
• force,
• occurrence,
• blessing,
• storm,
• signal,
• process,
• change,
• contingency,
• risk,
• shock,
• motion,
• object,
• condition,
• disease,
• misfortune,
• fluctuation,
• weather,
• upheaval,
• noise,
• cause,
• episode,
• thing,
• domain,
• danger,
• hazard,
• incident,
• elements,
• disaster,
• disorder,
• current,
• circumstances,
• illness,
• behaviour,
• phenomenon,
• action,