| Main Entry: | |
| Part of Speech: | noun |
| Definition: | duration |
| Synonyms: | constancy, continuation, endurance, extension, guts*, longevity, period, permanence, perpetuation, protraction, run, survival, term, vitality |
| Antonyms: | arrest, end, ending, finish, hindrance, obstruction, stop, stoppage |
| Main Entry: | duration |
| Part of Speech: | noun |
| Definition: | length of action, event |
| Synonyms: | continuance, continuation, continuity, endurance, extent, period, perpetuation, persistence, prolongation, run, span, spell, stretch, term, tide, time |
| Main Entry: | preservation |
| Part of Speech: | noun |
| Definition: | maintenance, protection |
| Synonyms: | canning, care, conservancy, conservation, curing, defense, evaporation, freezing, guard, guardianship, keeping, perpetuation, pickling, preserval, refrigeration, safeguard, safeguarding, safekeeping, safety, salvation, saving, security, shield, storage, support, sustentation, tanning, upholding, ward |
| Antonyms: | destruction, ruin |
| Main Entry: | permanence |
| Part of Speech: | noun |
| Definition: | continuity |
| Synonyms: | dependability, durability, immutability, permanency, perpetuation, stability |
| Main Entry: | endlessness |
| Part of Speech: | noun |
| Definition: | everlastingness |
| Synonyms: | ages and ages, ceaselessness, eternality, eternalness, eternity, forever, permanence, perpetuation, perpetuity, timelessness |
| Main Entry: | eternality |
| Part of Speech: | noun |
| Definition: | endlessness |
| Synonyms: | ages and ages, ceaselessness, eternalness, eternity, everlastingness, forever, infinity, permanence, perpetuation, perpetuity, timelessness |
| Main Entry: | eternalness |
| Part of Speech: | noun |
| Definition: | endlessness |
| Synonyms: | ages and ages, ceaselessness, eternality, eternity, everlastingness, forever, infinity, permanence, perpetuation, perpetuity, timelessness |
| Main Entry: | everlastingness |
| Part of Speech: | noun |
| Definition: | immortality |
| Synonyms: | afterlife, ages and ages, ceaselessness, deathlessness, endlessness, eternality, eternalness, eternity, everlasting life, forever, hereafter, permanence, perpetuation, perpetuity, timelessness |
| Main Entry: | persistency |
| Part of Speech: | noun |
| Definition: | continuation |
| Synonyms: | assiduity, augmenting, continuance, continuing, continuity, continuum, duration, endurance, enduring, extension, furtherance, going on, increase, increasing, line, maintaining, perpetuating, perpetuation, persistence, persisting, postscript, preservation, preserving, producing, production, prolongation, prolonging, propagation, protracting, protraction, sequel, succession, supplement, sustaining, sustenance, tenacity |