Category Nuances for null:

• major,
• social,
• abnormal,
• modern,
• unfortunate,
• subtle,
• over,
• historical,
• military,
• internal,
• domestic,
• seminal,
• horrible,
• immediate,
• disruptive,
• violent,
• historic,
• national,
• single,
• explosive,
• extraordinary,
• unforeseeable,
• significant,
• disparate,
• difficult,
• devastating,
• intense,
• important,
• bad,
• bloody,
• overt,
• political,
• contributing,
• armed,
• experienced,
• artificial,
• imminent,
• civil,
• local,
• random,
• abrupt,
• severe,
• regional,
• serious,
• general,
• past,
• unpredictable,
• global,
• temporary,
• critical,
• extreme,
• unrelated,
• familiar,
• tragic,

Simple Categories for null:

• event,
• cause,
• risk,
• war,
• conflict,
• disturbance,
• condition,
• movement,
• level,
• struggle,
• process,
• control,
• thing,
• danger,
• situation,
• act,