Laugh is related to Silly. Silly is a synonym of Stupid. Stupid is a synonym of Dense. Dense is a synonym of Slow. 
Far is related to Large. Large is related to Serving. 
Laugh <--RelatedTo--> Silly <--Synonym--> Stupid <--Synonym--> Dense <--Synonym--> Slow 
Far <--RelatedTo--> Large <--RelatedTo--> Serving 