Proposed is a form of Propose. Propose is a synonym of Put. Lean is a type of Put. Lean is a synonym of Rest. 
Vary is a synonym of Decline. Decline is the opposite of Rally. Rally is etymologically related to Rail. 
Proposed --FormOf--> Propose <--Synonym--> Put <--IsA-- Lean <--Synonym--> Rest 
Vary <--Synonym--> Decline <--Antonym--> Rally --EtymologicallyRelatedTo--> Rail 