Available is related to Opportunity. Opportunity is related to Hope. Hope is related to Want. 
Overcome is a synonym of Affect. Stimulate is a type of Affect. Stimulate is a synonym of Stir. 
Available <--RelatedTo--> Opportunity <--RelatedTo--> Hope <--RelatedTo--> Want 
Overcome <--Synonym--> Affect <--IsA-- Stimulate <--Synonym--> Stir 