Champion is a synonym of Defend. Defend is a type of Argue. Argue is a synonym of Debate. Debate is a synonym of Contest. 
Empire is related to Land. Floor is a type of Land. 
Champion <--Synonym--> Defend --IsA--> Argue <--Synonym--> Debate <--Synonym--> Contest 
Empire <--RelatedTo--> Land <--IsA-- Floor 