Rabbit is related to Hole. Hole is related to Deep. Deep is related to Pool. Pool is a synonym of Pot. 
Expected is the opposite of Unlikely. Unlikely is the opposite of Possible. Possible is the opposite of Unable. 
Rabbit <--RelatedTo--> Hole <--RelatedTo--> Deep <--RelatedTo--> Pool <--Synonym--> Pot 
Expected <--Antonym--> Unlikely <--Antonym--> Possible <--Antonym--> Unable 