See duration in Webster's New World Roget's A-Z Thesaurus II
noun
Uninterrupted existence or succession:
continuance, continuation, continuity, continuum, endurance, persistence, persistency. See continueA limited or specific period of time during which something happens, lasts, or extends:
span, stretch, term, time. See timeThe period during which someone or something exists:
day (often used in plural), existence, life, lifetime, span, term. See live, time
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