Payment is the opposite of Advance. Advance is related to Gain. Gain is a synonym of Clear. Clear is a synonym of Solve. 
West is related to Pioneer. Pioneer is a type of Introduce. Introduce is related to People. 
Payment <--Antonym--> Advance <--RelatedTo--> Gain <--Synonym--> Clear <--Synonym--> Solve 
West <--RelatedTo--> Pioneer --IsA--> Introduce <--RelatedTo--> People 