Chronic is a synonym of Continuing. Continuing is similar to Long. Long is related to Year. 
Strange is a synonym of New. New is the opposite of Expert. Expert is a synonym of Perfect. 
Chronic <--Synonym--> Continuing <--SimilarTo--> Long <--RelatedTo--> Year 
Strange <--Synonym--> New <--Antonym--> Expert <--Synonym--> Perfect 