Membership is a synonym of Rank. Rank is related to Undergraduate. 
Keep is related to Save. Save is a different concept from Waste. Waste is the opposite of Gain. Gain is a synonym of Reach. 
Membership <--Synonym--> Rank <--RelatedTo--> Undergraduate 
Keep <--RelatedTo--> Save <--DistinctFrom--> Waste <--Antonym--> Gain <--Synonym--> Reach 