Eligible is similar to Legal. Legal is related to Witness. Witness is a synonym of Find. Find is a synonym of Discovery. 
Like is related to Reason. Reason is the opposite of Random. 
Eligible <--SimilarTo--> Legal <--RelatedTo--> Witness <--Synonym--> Find <--Synonym--> Discovery 
Like <--RelatedTo--> Reason <--Antonym--> Random 