Laugh is related to Silly. Silly is a synonym of Stupid. Stupid is a synonym of Dense. Dense is a synonym of Slow. 
Steel is related to Element. Element is related to Bone. Bone is related to Stability. 
Laugh <--RelatedTo--> Silly <--Synonym--> Stupid <--Synonym--> Dense <--Synonym--> Slow 
Steel <--RelatedTo--> Element <--RelatedTo--> Bone <--RelatedTo--> Stability 