Pond is etymologically related to Pound. Pound is related to Tap. Tap is related to Action. 
Tactic is related to Attack. Attack is the opposite of Position. 
Pond --EtymologicallyRelatedTo--> Pound <--RelatedTo--> Tap <--RelatedTo--> Action 
Tactic <--RelatedTo--> Attack <--Antonym--> Position 