Expense is a synonym of Charge. Charge is related to Fine. Fine is related to Okay. Okay is a form of Ok. 
Fall is a synonym of Decrease. Decrease is related to Iron. you are likely to find Iron in/at/on Laundry. 
Expense <--Synonym--> Charge <--RelatedTo--> Fine <--RelatedTo--> Okay --FormOf--> Ok 
Fall <--Synonym--> Decrease <--RelatedTo--> Iron --AtLocation--> Laundry 