Rack is a type of Support. Support is related to Emotional. Emotional is related to Cry. Cry is related to Hungry. 
Gentle is the opposite of Rough. Rough is related to Feel. 
Rack --IsA--> Support <--RelatedTo--> Emotional <--RelatedTo--> Cry <--RelatedTo--> Hungry 
Gentle <--Antonym--> Rough <--RelatedTo--> Feel 