End is a type of Destroy. Period is a type of End. Period is the opposite of Frequency. Attendance is a type of Frequency. 
Terrorist is derived from Terror. Terror is related to Afraid. 
Destroy <--IsA-- End <--IsA-- Period <--Antonym--> Frequency <--IsA-- Attendance 
Terrorist --DerivedFrom--> Terror <--RelatedTo--> Afraid 