Far is related to Large. Large is related to River. River is related to Ribbon. Ribbon can be Thin. 
Pain is a synonym of Effort. Effort is related to Energy. Energy is related to Go. Go is the opposite of Remain. 
Far <--RelatedTo--> Large <--RelatedTo--> River <--RelatedTo--> Ribbon --HasProperty--> Thin 
Pain <--Synonym--> Effort <--RelatedTo--> Energy <--RelatedTo--> Go <--Antonym--> Remain 