Battle is related to Enemy. Enemy is a different concept from Ally. Ally is the opposite of Opponent. Opponent is a synonym of Competitor. 
Entrance is related to Mouth. Mouth is related to Open. Open is related to Window. Window is related to Eye. 
Battle <--RelatedTo--> Enemy <--DistinctFrom--> Ally <--Antonym--> Opponent <--Synonym--> Competitor 
Entrance <--RelatedTo--> Mouth <--RelatedTo--> Open <--RelatedTo--> Window <--RelatedTo--> Eye 