Secret is a synonym of Mysterious. Mysterious is derived from Mystery. Mystery is related to Spy. Spy is related to Detective. 
Wash is related to Spin. Spin is a synonym of Turn. 
Secret <--Synonym--> Mysterious --DerivedFrom--> Mystery <--RelatedTo--> Spy <--RelatedTo--> Detective 
Wash <--RelatedTo--> Spin <--Synonym--> Turn 