House is related to Apartment. Apartment is related to Rent. 
Proof is a type of Argument. Argument is a synonym of Debate. Debate is a synonym of Contend. Contend is a synonym of Cope. 
House <--RelatedTo--> Apartment <--RelatedTo--> Rent 
Proof --IsA--> Argument <--Synonym--> Debate <--Synonym--> Contend <--Synonym--> Cope 