Prediction is a synonym of Guess. Guess is a synonym of Hazard. Hazard is related to Threat. 
Contribute is a synonym of Lend. Lend is the opposite of Borrow. 
Prediction <--Synonym--> Guess <--Synonym--> Hazard <--RelatedTo--> Threat 
Contribute <--Synonym--> Lend <--Antonym--> Borrow 