Related is related to Profit. Profit is related to Banking. Banker can be used for Banking. 
Empty is a synonym of Lonely. Lonely is a different concept from Popular. Popular is similar to Democratic. Democratic is similar to Republican. 
Related <--RelatedTo--> Profit <--RelatedTo--> Banking <--UsedFor-- Banker 
Empty <--Synonym--> Lonely <--DistinctFrom--> Popular <--SimilarTo--> Democratic <--SimilarTo--> Republican 