Coat is a type of Cover. Coat is related to Sweater. 
Restore is a synonym of Repair. Repair is a type of Better. Better is related to Improve. Improve is a synonym of Enhance. 
Cover <--IsA-- Coat <--RelatedTo--> Sweater 
Restore <--Synonym--> Repair --IsA--> Better <--RelatedTo--> Improve <--Synonym--> Enhance 