Modifiers matching contingency:

• negative,
• major,
• unforeseen,
• unexpected,
• unavoidable,
• financial,
• immediate,
• usual,
• social,
• natural,
• future,
• adverse,
• specified,
• external,
• remote,
• acute,
• permanent,
• routine,
• unpleasant,
• unusual,
• complex,
• new,
• historical,
• idiosyncratic,
• particular,
• unpredictable,
• unforeseeable,
• single,

Simple categories matching unforeseen:

• eventuality,
• circumstances,
• catastrophe,
• event,
• force,
• setback,
• situation,
• problem,
• expenditure,
• work,
• weather,
• charge,
• case,
• incident,
• occurrence,
• happening,
• difficulty,
• calamity,
• hazard,
• condition,
• accident,
• misfortune,
• circumstance,
• adversity,
• development,
• shock,
• trouble,
• expense,
• disaster,
• crisis,
• consequence,
• cataclysm,
• disturbance,
• contingency,
• thing,
• emergency,