Buy is a type of Get. Buy is related to Exchange. Exchange is related to Program. 
Restore is a synonym of Repair. Repair is the opposite of Damage. Damage is a synonym of Price. Price is related to Reward. 
Get <--IsA-- Buy <--RelatedTo--> Exchange <--RelatedTo--> Program 
Restore <--Synonym--> Repair <--Antonym--> Damage <--Synonym--> Price <--RelatedTo--> Reward 