Ball is a synonym of Screw. Screw is a type of Tighten. Tighten is derived from Tight. 
Human is related to Baby. Baby is related to Generation. Generation is related to Boom. 
Ball <--Synonym--> Screw --IsA--> Tighten --DerivedFrom--> Tight 
Human <--RelatedTo--> Baby <--RelatedTo--> Generation <--RelatedTo--> Boom 