Cap is a synonym of Lid. Lid is related to Cover. Cover is a synonym of Blanket. Blanket is a type of Layer. 
Fur is related to Cotton. Cotton is related to Machine. 
Cap <--Synonym--> Lid <--RelatedTo--> Cover <--Synonym--> Blanket --IsA--> Layer 
Fur <--RelatedTo--> Cotton <--RelatedTo--> Machine 