unending

from WordNet (r) 3.0 (2006)

unending
    adj 1: continuing forever or indefinitely; "the ageless themes
           of love and revenge"; "eternal truths"; "life
           everlasting"; "hell's perpetual fires"; "the unending
           bliss of heaven" [syn: {ageless}, {aeonian}, {eonian},
           {eternal}, {everlasting}, {perpetual}, {unending},
           {unceasing}]

from The Collaborative International Dictionary of English v.0.48

Unending \Unending\
   See {ending}.

from Moby Thesaurus II by Grady Ward, 1.0

73 Moby Thesaurus words for "unending":
      ageless, amaranthine, articulated, catenated, ceaseless, coeternal,
      concatenated, connected, constant, continual, continued,
      continuing, continuous, cyclical, dateless, direct, endless,
      eternal, eterne, ever-being, ever-durable, ever-during,
      everlasting, everliving, featureless, gapless, immediate,
      immemorial, immortal, incessant, indestructible, infinite,
      interminable, joined, jointless, linked, monotonous, never-ceasing,
      never-ending, nonstop, nonterminating, nonterminous, olamic,
      perdurable, perennial, periodic, permanent, perpetual, recurrent,
      repetitive, round-the-clock, running, seamless, sempiternal,
      serried, smooth, stable, steady, straight, timeless,
      twenty-four-hour, unbroken, unceasing, undifferentiated, uniform,
      unintermitted, unintermittent, unintermitting, uninterrupted,
      unrelieved, unremitting, unstopped, without end