Break is related to Glass. Glass is the opposite of Wood. Wood is related to Plane. 
Stock is similar to Standard. Standard is similar to Common. Common is related to Apple. Apple is the opposite of Orange. 
Break <--RelatedTo--> Glass <--Antonym--> Wood <--RelatedTo--> Plane 
Stock <--SimilarTo--> Standard <--SimilarTo--> Common <--RelatedTo--> Apple <--Antonym--> Orange 