Drum is a synonym of Barrel. Barrel is related to Rifle. Rifle is related to Similar. 
Healthy is a different concept from Cake. Cake can be False. False is the opposite of True. True is related to Actual. 
Drum <--Synonym--> Barrel <--RelatedTo--> Rifle <--RelatedTo--> Similar 
Healthy <--DistinctFrom--> Cake --HasProperty--> False <--Antonym--> True <--RelatedTo--> Actual 