Courtroom is a synonym of Court. Court is related to Bench. Bench is a different concept from Chair. 
Tv is made of Plastic. Plastic can be used for Make. Beat is a type of Make. Eliminate is a type of Beat. 
Courtroom <--Synonym--> Court <--RelatedTo--> Bench <--DistinctFrom--> Chair 
Tv --MadeOf--> Plastic --UsedFor--> Make <--IsA-- Beat <--IsA-- Eliminate 