Toilet is related to Twist. Twist is related to Rope. 
Restriction is a synonym of Limitation. Limitation is a type of Regulation. Regulation is related to Rule. Rule is related to Legislation. 
Toilet <--RelatedTo--> Twist <--RelatedTo--> Rope 
Restriction <--Synonym--> Limitation --IsA--> Regulation <--RelatedTo--> Rule <--RelatedTo--> Legislation 