Modifiers matching circumstance:

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

Simple categories matching extreme:

• condition,
• force,
• crime,
• position,
• event,
• occurrence,
• emotion,
• act,
• halophile,
• form,
• change,
• weather,
• situation,
• crisis,
• activity,
• sport,
• catastrophe,
• action,
• subject,
• violation,
• discomfort,
• reaction,
• passion,
• phenomenon,
• manifestation,
• irregularity,
• metal,
• hardship,
• measure,
• suffering,
• danger,
• group,
• location,
• environment,
• surgery,
• incident,
• circumstances,
• style,
• experience,
• misconduct,
• capability,
• risk,
• violence,
• mood,
• illness,
• adversity,
• pastime,
• emergency,
• habitat,
• athlete,
• disturbance,
• storm,
• pathology,
• punishment,
• practice,
• case,
• offense,
• area,
• object,
• arousal,
• route,
• procedure,
• endeavour,
• wedding,
• treatment,
• operation,
• deprivation,
• austerity,
• process,
• behaviour,
• mortification,
• item,
• behavior,
• offence,
• elements,
• symptom,
• pressure,
• disorder,
• repression,
• consequence,
• difficulty,
• thing,
• feeling,
• abuse,
• error,
• hazard,
• state,
• instance,
• conflict,
• aggression,
• circumstance,
• move,
• sensation,
• posture,
• pain,
• distress,
• symbol,
• affliction,
• oxidation,
• anxiety,
• windstorm,
• philosophy,
• seizure,
• idea,
• influence,
• psychosis,