Optimistic is related to Positive. Positive is related to Glory. Glory is related to Old. 
Join is a synonym of Associate. Associate is a synonym of Link. Link is related to Fence. Fence is a synonym of Argue. 
Optimistic <--RelatedTo--> Positive <--RelatedTo--> Glory <--RelatedTo--> Old 
Join <--Synonym--> Associate <--Synonym--> Link <--RelatedTo--> Fence <--Synonym--> Argue 