Preserve is the opposite of Waste. Waste is the opposite of Conservation. Conservation is related to Cause. Cause is related to Motive. 
you are likely to find Car in/at/on Parade. Parade is related to Band. Band is related to Drum. you are likely to find Drum in/at/on Ear. 
Preserve <--Antonym--> Waste <--Antonym--> Conservation <--RelatedTo--> Cause <--RelatedTo--> Motive 
Car --AtLocation--> Parade <--RelatedTo--> Band <--RelatedTo--> Drum --AtLocation--> Ear 