Modifiers matching trouble:

• unexpected,
• mental,
• fatal,
• political,
• psychological,
• financial,
• technical,
• internal,
• major,
• mechanical,
• experienced,
• economic,
• small,
• real,
• serious,
• sexual,
• everyday,
• undesirable,
• environmental,
• unforeseen,
• temporary,

Simple categories matching fatal:

• sickness,
• event,
• accident,
• disease,
• illness,
• virus,
• ailment,
• condition,
• cancer,
• infection,
• pathology,
• complication,
• disorder,
• disaster,
• situation,
• consequence,
• result,
• injury,
• weapon,
• trouble,
• error,
• abnormality,
• symptom,
• malignancy,