Disc is related to Coin. Coin is related to Term. Term is related to Bill. Bill is related to Mortgage. 
Secure is a synonym of Fast. Fast is related to Slow. 
Disc <--RelatedTo--> Coin <--RelatedTo--> Term <--RelatedTo--> Bill <--RelatedTo--> Mortgage 
Secure <--Synonym--> Fast <--RelatedTo--> Slow 