bolster
conserve
continue
embalm
eternalize
eternize
extend
freeze
hold
immortalize
keep
keep alive
keep fresh
keep going
keep on
keep up
lengthen
maintain
memorialize
monumentalize
perennialize
perpetuated
preserve
preserve from oblivion
prolong
protract
retain
secure
support
sustain
bear on
carry on
uphold
perpetuates
perpetuating