Cast is related to Bone. Bone is related to Segment. Segment is a synonym of Bit. Bit is a synonym of Private. 
Recover is related to Rest. Rest is etymologically related to Arrest. 
Cast <--RelatedTo--> Bone <--RelatedTo--> Segment <--Synonym--> Bit <--Synonym--> Private 
Recover <--RelatedTo--> Rest --EtymologicallyRelatedTo--> Arrest 