Coast is related to Mass. Mass is related to Density. 
Servant is related to Little. Little is a synonym of Slight. Slight is the opposite of Value. Value is related to Moral. 
Coast <--RelatedTo--> Mass <--RelatedTo--> Density 
Servant <--RelatedTo--> Little <--Synonym--> Slight <--Antonym--> Value <--RelatedTo--> Moral 