Curtain is related to Shade. 
Yell is a synonym of Cry. Cry is related to State. State is related to Ruin. Ruin is related to Wilderness. 
Curtain <--RelatedTo--> Shade 
Yell <--Synonym--> Cry <--RelatedTo--> State <--RelatedTo--> Ruin <--RelatedTo--> Wilderness 