Neck is related to Rub. Rub is related to Action. Action is related to Reduce. Reduce is related to Boil. 
Course is related to Lesson. Lesson is a synonym of Moral. Moral is a type of Meaning. Meaning is a type of Idea. 
Neck <--RelatedTo--> Rub <--RelatedTo--> Action <--RelatedTo--> Reduce <--RelatedTo--> Boil 
Course <--RelatedTo--> Lesson <--Synonym--> Moral --IsA--> Meaning --IsA--> Idea 