Money is related to Royal. Royal is related to Top. Top is related to Bottle. 
Single is related to Drop. Drop is related to Circle. Circle is related to Head. Headache is derived from Head. 
Money <--RelatedTo--> Royal <--RelatedTo--> Top <--RelatedTo--> Bottle 
Single <--RelatedTo--> Drop <--RelatedTo--> Circle <--RelatedTo--> Head <--DerivedFrom-- Headache 