agelessness Synonyms

endless life resoluteness persistence perpetuity permanency perdurability invariability inalterability imperishability immutability immortalization sustainment sustentation sustention continued existence billion years continuousness ceaselessness carrying-on deathlessness athanasia timelessness immutableness changelessness immortality fixity conservancy congruity broadening being augmentation augmenting assiduity amplification agreement adhesion conservation conserving consistency everlastingness eternity endurance endlessness continuity continuing continuation continuance constancy consonance abidance