Cousin is a type of Relative. Relative is a synonym of Limited. 
Thick is similar to Heavy. Heavy is similar to Steep. Steep is a type of Concentrate. Concentrate is a synonym of Center. 
Cousin --IsA--> Relative <--Synonym--> Limited 
Thick <--SimilarTo--> Heavy <--SimilarTo--> Steep --IsA--> Concentrate <--Synonym--> Center 