preservation (especially the prevention of loss, waste etc by controlling use)

preservation

the act of preserving something; the condition of something that has been preserved

maintenance, protection

the act of saving, the state of having been saved, from sin; something that prevents loss, disaster etc

rescue, saving

the act of supporting or being supported; something that supports weight; money etc to live on; to bear the weight of (something); keep (something) in place

something that holds up structure

(the cost of) keeping something in good order and repair

maintenance