Bill is related to Monthly. Monthly is related to Period. Period is a type of End. End is a synonym of Purpose. 
Verbal is the opposite of Written. Written is related to Design. Design is related to Print. Print is the opposite of Input. 
Bill <--RelatedTo--> Monthly <--RelatedTo--> Period --IsA--> End <--Synonym--> Purpose 
Verbal <--Antonym--> Written <--RelatedTo--> Design <--RelatedTo--> Print <--Antonym--> Input 