Case is related to Ideal. Ideal is related to High. High is related to Important. Important is related to Vital. 
Steam is related to Pot. Pot is a synonym of Pocket. 
Case <--RelatedTo--> Ideal <--RelatedTo--> High <--RelatedTo--> Important <--RelatedTo--> Vital 
Steam <--RelatedTo--> Pot <--Synonym--> Pocket 