Surveillance is derived from Survey. Survey is a synonym of Study. 
Body is related to Full. Complete is etymologically related to Full. Complete is a synonym of Turn. Turn is a synonym of Flip. 
Surveillance --DerivedFrom--> Survey <--Synonym--> Study 
Body <--RelatedTo--> Full <--EtymologicallyRelatedTo-- Complete <--Synonym--> Turn <--Synonym--> Flip 