Week is a synonym of Weekly. Weekly is related to Payment. Payment is related to Make. Make is related to Silk. 
Grave is related to Rest. Rest is the opposite of Tired. 
Week <--Synonym--> Weekly <--RelatedTo--> Payment <--RelatedTo--> Make <--RelatedTo--> Silk 
Grave <--RelatedTo--> Rest <--Antonym--> Tired 