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

preservation

used for, intended for, defending

protective, watchful

to go round (a place) to see that all is well, to look out for people doing wrong, in need of help etc

guarding; guard

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

maintenance, protection

(substance) used for preserving (e.g. food)

saving

giving protection

guarding, securing