Cost is related to Number. Number is related to Like. Like is related to Bone. Bone is related to Unit. 
Harsh is a synonym of Severe. Severe is a synonym of Brutal. Brutal is similar to Direct. 
Cost <--RelatedTo--> Number <--RelatedTo--> Like <--RelatedTo--> Bone <--RelatedTo--> Unit 
Harsh <--Synonym--> Severe <--Synonym--> Brutal <--SimilarTo--> Direct 