Alcohol is a type of Fuel. Fuel is related to Gasoline. Gasoline is related to Pump. 
Bulb is related to Idea. Idea is related to Potential. Potential is a synonym of Likely. 
Alcohol --IsA--> Fuel <--RelatedTo--> Gasoline <--RelatedTo--> Pump 
Bulb <--RelatedTo--> Idea <--RelatedTo--> Potential <--Synonym--> Likely 