Replacement is derived from Replace. Replace is related to Change. Swing is a type of Change. Swing is a synonym of Sweep. 
Saving is related to Keep. Keep is a synonym of Sustain. 
Replacement --DerivedFrom--> Replace <--RelatedTo--> Change <--IsA-- Swing <--Synonym--> Sweep 
Saving <--RelatedTo--> Keep <--Synonym--> Sustain 