Bird is related to Bill. Bill is related to Husband. Husband is related to King. King is related to Country. 
Perfect is a synonym of Improve. Improve is a synonym of Enhance. 
Bird <--RelatedTo--> Bill <--RelatedTo--> Husband <--RelatedTo--> King <--RelatedTo--> Country 
Perfect <--Synonym--> Improve <--Synonym--> Enhance 