Vary is etymologically related to Various. Vary is related to Change. Spot is a type of Change. Spot is a synonym of Position. 
Advantage is a synonym of Privilege. Privilege is a synonym of Claim. Claim is a synonym of Title. Title is related to Respect. 
Various <--EtymologicallyRelatedTo-- Vary <--RelatedTo--> Change <--IsA-- Spot <--Synonym--> Position 
Advantage <--Synonym--> Privilege <--Synonym--> Claim <--Synonym--> Title <--RelatedTo--> Respect 