Modifiers matching circumstance:

• involuntary,
• historical,
• unfortunate,
• individual,
• unforeseen,
• stressful,
• severe,
• bad,
• extraordinary,
• extreme,
• unusual,
• unexpected,
• relevant,
• unforeseeable,
• negative,
• common,
• external,
• unavoidable,
• catastrophic,
• verifiable,
• personal,
• unique,
• exceptional,
• threatening,
• exigent,
• special,

Simple categories matching exceptional:

• property,
• circumstance,
• situation,
• structure,
• character,
• case,
• benefit,
• characteristic,
• occurrence,
• event,
• circumstances,
• advantage,
• skill,
• measure,
• condition,
• quality,
• item,
• environment,
• happening,