Channel is a synonym of Line. Line is related to Finish. Finish is related to Conclude. Conclude is a synonym of Arrange. 
Heart is a synonym of Meaning. Meaning is a synonym of Substance. Substance is related to Metal. Metal is related to Density. 
Channel <--Synonym--> Line <--RelatedTo--> Finish <--RelatedTo--> Conclude <--Synonym--> Arrange 
Heart <--Synonym--> Meaning <--Synonym--> Substance <--RelatedTo--> Metal <--RelatedTo--> Density 