Bill is a type of Proposal. Hypothesis is a type of Proposal. Hypothesis is related to Theory. Theory is a type of Belief. 
Step is the opposite of Leap. Leap is a type of Transition. Transition is a synonym of Conversion. 
Bill --IsA--> Proposal <--IsA-- Hypothesis <--RelatedTo--> Theory --IsA--> Belief 
Step <--Antonym--> Leap --IsA--> Transition <--Synonym--> Conversion 