Understand is a synonym of Realize. Realize is a synonym of Recognize. Recognize is related to Sight. Insight is etymologically related to Sight. 
Advantage is a type of Prefer. Prefer is related to Like. Like is related to Weather. Weather is related to Local. 
Understand <--Synonym--> Realize <--Synonym--> Recognize <--RelatedTo--> Sight <--EtymologicallyRelatedTo-- Insight 
Advantage --IsA--> Prefer <--RelatedTo--> Like <--RelatedTo--> Weather <--RelatedTo--> Local 