Bright is the opposite of Dirty. Dirty is the opposite of Soap. Soap is related to Smell. 
Death is a synonym of Rider. Rider is part of Bill. Bill is related to Demand. Demand is a synonym of Request. 
Bright <--Antonym--> Dirty <--Antonym--> Soap <--RelatedTo--> Smell 
Death <--Synonym--> Rider --PartOf--> Bill <--RelatedTo--> Demand <--Synonym--> Request 