Commercial is the opposite of Show. Show is related to Rent. 
Thread is part of Towel. Thread is similar to Cord. Cord is a type of Rope. Rope is related to Hang. 
Commercial <--Antonym--> Show <--RelatedTo--> Rent 
Towel <--PartOf-- Thread <--SimilarTo--> Cord --IsA--> Rope <--RelatedTo--> Hang 