Pile is a type of Thread. Thread is a synonym of Topic. Topic is a synonym of Purpose. Purpose is related to Use. 
Business is related to Negotiation. Negotiation is derived from Negotiate. Negotiate is related to Offer. Offer is related to Promotion. 
Pile --IsA--> Thread <--Synonym--> Topic <--Synonym--> Purpose <--RelatedTo--> Use 
Business <--RelatedTo--> Negotiation --DerivedFrom--> Negotiate <--RelatedTo--> Offer <--RelatedTo--> Promotion 