Imply is a synonym of Hint. Hint is a synonym of Tip. Tip is related to Extra. Extra is related to Interest. 
Current is related to Recent. Recent is the opposite of Later. Later is related to Note. Note is a synonym of Buck. 
Imply <--Synonym--> Hint <--Synonym--> Tip <--RelatedTo--> Extra <--RelatedTo--> Interest 
Current <--RelatedTo--> Recent <--Antonym--> Later <--RelatedTo--> Note <--Synonym--> Buck 