Rack is etymologically related to Rock. Rock is a synonym of Refuge. Refuge is related to Heaven. 
Drift is a type of Crop. Crop is related to Agricultural. Agricultural is related to Rice. Rice is related to Pork. 
Rack --EtymologicallyRelatedTo--> Rock <--Synonym--> Refuge <--RelatedTo--> Heaven 
Drift --IsA--> Crop <--RelatedTo--> Agricultural <--RelatedTo--> Rice <--RelatedTo--> Pork 