Modifiers matching calamity:

• terrible,
• unforeseen,
• natural,
• financial,
• massive,
• public,
• common,
• national,
• marine,
• widespread,
• sudden,
• major,
• world,
• devastating,
• destructive,
• environmental,
• international,
• violent,
• physical,
• unfortunate,
• serious,
• political,
• unforeseeable,

Simple categories matching terrible:

• disease,
• thing,
• situation,
• cancer,
• end,
• condition,
• illness,
• practice,
• experience,
• way,
• ways,
• disaster,
• accident,
• event,
• affliction,
• weather,
• deeds,
• subject,
• crime,
• day,
• form,
• circumstances,
• calamity,
• infection,
• storm,
• catastrophe,
• incident,
• consequence,
• creation,
• happening,