From The Collaborative International Dictionary of English v.0.44 [gcide]:
Perdurable \Per*dur"a*ble\ (p[~e]r*d[=u]r"[.a]*b'l; 277), noun [Cf. F. perdurable, OE. pardurable. See {Perdure}.] Very durable; lasting; continuing long. [Archaic] --Chaucer. --Shak. -- {Per*dur"a*bly}, adverb [Archaic]
From WordNet (r) 2.0 [wn]:
adjective
1: very long lasting; "less durable rocks were gradually worn away to form valleys"; "the perdurable granite of the ancient Appalachian spine of the continent" [syn: {durable}, {indestructible}, {undestroyable}]
From Moby Thesaurus II by Grady Ward, 1.0 [moby-thes]:
75 Moby Thesaurus words for "perdurable": abiding, age-long, aged, ageless, ancient, antique, ceaseless, chronic, coeternal, constant, continual, continuing, continuous, dateless, diuturnal, durable, endless, enduring, eternal, eterne, ever-being, ever-durable, ever-during, evergreen, everlasting, everliving, hardy, illimitable, immemorial, immutable, incessant, indestructible, infinite, interminable, intransient, inveterate, lasting, long-lasting, long-lived, long-standing, long-term, longeval, longevous, macrobiotic, never-ceasing, never-ending, nonstop, nonterminating, nonterminous, of long duration, of long standing, olamic, perduring, perennial, permanent, perpetual, persistent, persisting, remaining, sempervirent, sempiternal, stable, staying, steadfast, steady, timeless, tough, unceasing, unending, unfading, unintermitting, uninterrupted, unremitting, vital, without end
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