Casualty is a type of Victim. Victim is the opposite of Criminal. Criminal is related to Record. Record is related to Business. 
Taxpayer is derived from Tax. Tax is related to Return. 
Casualty --IsA--> Victim <--Antonym--> Criminal <--RelatedTo--> Record <--RelatedTo--> Business 
Taxpayer --DerivedFrom--> Tax <--RelatedTo--> Return 