Punishment is related to Harsh. Harsh is a synonym of Hard. 
Silly is a synonym of Soft. Soft is related to Bed. Bed is related to Rest. Rest is related to People. 
Punishment <--RelatedTo--> Harsh <--Synonym--> Hard 
Silly <--Synonym--> Soft <--RelatedTo--> Bed <--RelatedTo--> Rest <--RelatedTo--> People 