Discipline is a synonym of Sphere. Province is a type of Sphere. Province is part of Country. Country is related to County. 
Singer is related to Vocal. Vocal is related to Laugh. Laugh is related to Joke. 
Discipline <--Synonym--> Sphere <--IsA-- Province --PartOf--> Country <--RelatedTo--> County 
Singer <--RelatedTo--> Vocal <--RelatedTo--> Laugh <--RelatedTo--> Joke 