Deal is a synonym of Trade. Trade is related to Seller. Bear is a type of Seller. Bear is a type of Transport. 
Tobacco is related to Leaf. Leaf is a synonym of Thumb. 
Deal <--Synonym--> Trade <--RelatedTo--> Seller <--IsA-- Bear --IsA--> Transport 
Tobacco <--RelatedTo--> Leaf <--Synonym--> Thumb 