Modifiers matching break:

• logical,
• short,
• vertical,
• natural,
• physical,
• visual,
• structural,
• conceptual,
• meaningful,
• residential,
• unpredictable,
• additional,
• major,
• architectural,
• over,
• long,
• everyday,

Simple categories matching unpredictable:

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