Relative is related to Time. Time is a type of Constant. Constant is a synonym of Continuous. Continuous is similar to Consecutive. 
Contractor is a type of Worker. Assistant is a type of Worker. Secretary is a type of Assistant. 
Relative <--RelatedTo--> Time --IsA--> Constant <--Synonym--> Continuous <--SimilarTo--> Consecutive 
Contractor --IsA--> Worker <--IsA-- Assistant <--IsA-- Secretary 