Encourage is a synonym of Comfort. Comfort is related to Emotion. Emotion is related to Blue. Blue is related to Depressed. 
Move is related to Attack. Attack is a different concept from Defend. Defend is a type of Argue. 
Encourage <--Synonym--> Comfort <--RelatedTo--> Emotion <--RelatedTo--> Blue <--RelatedTo--> Depressed 
Move <--RelatedTo--> Attack <--DistinctFrom--> Defend --IsA--> Argue 