制覇[seiha] conquest
覇王樹[saboten] cactus
争覇[souha] contending for victory
争覇戦[souhasen] struggle for supremacy
覇気[haki] ambition

覇権[haken] hegemony
覇者[hasha] supreme ruler
連覇[renpa] successive championships
覇道[hadou] military rule
覇業[hagyou] domination