WordNet sense 1 (bring into safety):

carry through, bring through

WordNet sense 2 (save from sins):

deliver, redeem

WordNet sense 3 (save from ruin, destruction, or harm):

relieve, salvage, salve, salve

WordNet sense 4 (refrain from harming):

spare

WordNet sense 5 (spend sparingly, avoid the waste of):

economize, economise

WordNet sense 6 (retain rights to):

keep, keep open, hold open

WordNet sense 7 (feather one's nest; have a nest egg):

lay aside, save up

WordNet sense 8 (to keep up and reserve for personal or special use):

preserve

WordNet sense 9 (make unnecessary an expenditure or effort):

make unnecessary