Blood is related to Dark. Dark is related to Grave. Grave is related to Others. 
Objective is similar to Real. Real is the opposite of Ghost. Ghost is a synonym of Hint. 
Blood <--RelatedTo--> Dark <--RelatedTo--> Grave <--RelatedTo--> Others 
Objective <--SimilarTo--> Real <--Antonym--> Ghost <--Synonym--> Hint 