permanence Synonyms

permanency perpetuation robustness self-consistency sempiternity settledness solidity soundness stability stableness rigor rigidity perpetuity persistence persistency reliability remanence resoluteness retention retentivity steadfastness steadiness unchangeableness changelessness unalterability lastingness ceaselessness continuousness dependability invariableness uniformity toughness tenure steel stoutness strength sturdiness substantiality survival survivance tenacity overstability intransmutability bindingness endurance eternity everlastingness existence fastness firmness