Boy is related to Jaw. you are likely to find Muscle in/at/on Jaw. Muscle is related to Substance. 
Abstract is a synonym of Theoretical. Theoretical is the opposite of Actual. Actual is similar to Effective. Effective is related to Efficient. 
Boy <--RelatedTo--> Jaw <--AtLocation-- Muscle <--RelatedTo--> Substance 
Abstract <--Synonym--> Theoretical <--Antonym--> Actual <--SimilarTo--> Effective <--RelatedTo--> Efficient 