perpetuation Synonyms

lengthening protraction continuance preservation prolongation protracting propagation preserving ages and ages persistence perpetuity perpetuate retention sequel upholding everlasting life eternalness eternality ceaselessness deathlessness lastingness timelessness sustaining stability perpetuating permanency eternity endurance endlessness duration durability continuity continuing continuation constancy everlastingness existence extension permanence maintenance maintaining lengthiness keeping increase imperishability immortalization immortality conservation