Course is related to Route. Route is related to Rural. 
Worry is a type of Mind. Worry is a synonym of Sweat. Sweat is related to Salt. Salt is related to Taste. 
Course <--RelatedTo--> Route <--RelatedTo--> Rural 
Mind <--IsA-- Worry <--Synonym--> Sweat <--RelatedTo--> Salt <--RelatedTo--> Taste 