Old is related to Hay. Hay is related to Dry. Dry is related to Hang. 
Hill is related to Dirt. Dirt is related to Stone. Stone is related to Name. Name is related to May. 
Old <--RelatedTo--> Hay <--RelatedTo--> Dry <--RelatedTo--> Hang 
Hill <--RelatedTo--> Dirt <--RelatedTo--> Stone <--RelatedTo--> Name <--RelatedTo--> May 