Enemy is related to Opponent. Opponent is the opposite of Ally. you are likely to find Cat in/at/on Ally. 
Business is related to Partner. Partner is related to Friendly. Friendly is the opposite of Hard. 
Enemy <--RelatedTo--> Opponent <--Antonym--> Ally <--AtLocation-- Cat 
Business <--RelatedTo--> Partner <--RelatedTo--> Friendly <--Antonym--> Hard 