Stick is related to Bat. Bat is related to Rat. Rat is related to Fur. 
Edge is a synonym of Advantage. Advantage is related to Others. Others is related to Middle. Middle is related to Exact. 
Stick <--RelatedTo--> Bat <--RelatedTo--> Rat <--RelatedTo--> Fur 
Edge <--Synonym--> Advantage <--RelatedTo--> Others <--RelatedTo--> Middle <--RelatedTo--> Exact 