Level is a type of Destroy. Destroy is a synonym of Waste. Waste is related to Extra. Extra is related to Spare. 
Show is related to Rent. Rental is derived from Rent. 
Level --IsA--> Destroy <--Synonym--> Waste <--RelatedTo--> Extra <--RelatedTo--> Spare 
Show <--RelatedTo--> Rent <--DerivedFrom-- Rental 