Presidential is related to Elect. Elect is related to Process. Process is related to Experiment. 
Forbid is a synonym of Ban. Abandon is etymologically related to Ban. Abandon is a synonym of Quit. 
Presidential <--RelatedTo--> Elect <--RelatedTo--> Process <--RelatedTo--> Experiment 
Forbid <--Synonym--> Ban <--EtymologicallyRelatedTo-- Abandon <--Synonym--> Quit 