Aluminum is a type of Metal. Metal is related to Building. Building is related to Ruin. 
Opposition is the opposite of Ally. Ally is related to Street. Street is related to Cross. 
Aluminum --IsA--> Metal <--RelatedTo--> Building <--RelatedTo--> Ruin 
Opposition <--Antonym--> Ally <--RelatedTo--> Street <--RelatedTo--> Cross 