abidingness, age, antiquity, application, assiduity, assiduousness, bulldog tenacity, ceaselessness, changelessness, coeternity, concentration, constancy, continualness, continuance, defeat of time, defiance of time, dependability, diligence, diuturnity, dogged perseverance, doggedness, durability, durableness, duration, endlessness, endurance, engrossment, eternalness, eternity, ever-duringness, everlastingness, everness, fidelity, fixedness, foreverness, immutability, incessancy, incommutability, indefatigability, indefeasibility, indestructibility, industriousness, industry, inertness, infinite duration, infinity, insistence, insistency, interminability, intransmutability, irretrievability, irreversibility, irrevocability, lastingness, long standing, long-lastingness, long-livedness, longevity, loyalty, maintenance, never-endingness, obstinacy, patience, patience of Job, perdurability, perennation, perenniality, perennialness, permanency, perpetualness, perpetuity, perseverance, persistence, persistency, pertinaciousness, pertinacity, plodding, plugging, preoccupation, relentlessness, reliability, resolution, sedulity, sedulousness, sempiternity, single-mindedness, singleness of purpose, slogging, stability, stamina, standing, staying power, steadfastness, steadiness, stick-to-itiveness, stubbornness, survival, survivance, tenaciousness, tenacity, timelessness, tirelessness, unalterability, unceasingness, unchangeability, unchangeableness, unmodifiability, unremittingness, unrestorableness, unreturnableness, unswerving attention