Odds is a type of Ratio. Odds is related to Advantage. Advantage is related to Gain. 
Fork can be used for Eating. Fork is a type of Attack. Attack is the opposite of Defend. 
Ratio <--IsA-- Odds <--RelatedTo--> Advantage <--RelatedTo--> Gain 
Eating <--UsedFor-- Fork --IsA--> Attack <--Antonym--> Defend 