Rule is related to Fair. Fair is related to Balanced. 
Able is a synonym of Suitable. Suitable is similar to Eligible. Eligible is similar to Legal. Legal is similar to Judicial. 
Rule <--RelatedTo--> Fair <--RelatedTo--> Balanced 
Able <--Synonym--> Suitable <--SimilarTo--> Eligible <--SimilarTo--> Legal <--SimilarTo--> Judicial 