Source is related to Air. Air is related to Chicken. Chicken is related to Eating. Hunger can cause/lead to Eating. 
Bonus is related to Reward. Reward is the opposite of Fee. Fee is related to Amount. Amount is related to Portion. 
Source <--RelatedTo--> Air <--RelatedTo--> Chicken <--RelatedTo--> Eating <--Causes-- Hunger 
Bonus <--RelatedTo--> Reward <--Antonym--> Fee <--RelatedTo--> Amount <--RelatedTo--> Portion 