The Collaborative International Dictionary of English v.0.48:

Continuance \Con*tin"u*ance\, n. [OF. continuance.]
   1. A holding on, or remaining in a particular state;
      permanence, as of condition, habits, abode, etc.;
      perseverance; constancy; duration; stay.
      [1913 Webster]

            Great plagues, and of long continuance. --Deut.
                                                  xxviii. 59.
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            Patient continuance in well-doing.    --Rom. ii. 7.
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   2. Uninterrupted succession; continuation; constant renewal;
      perpetuation; propagation.
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            The brute immediately regards his own preservation
            or the continuance of his species.    --Addison.
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   3. A holding together; continuity. [Obs.] --Bacon.
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   4. (Law)
      (a) The adjournment of the proceedings in a cause from one
          day, or from one stated term of a court, to another.
      (b) The entry of such adjournment and the grounds thereof
          on the record.
          [1913 Webster]

Moby Thesaurus II by Grady Ward, 1.0:

90 Moby Thesaurus words for "continuance":
   PS, Parthian shot, abidingness, addendum, afterthought, age,
   antiquity, appendix, back matter, ceaselessness, chorus, coda,
   codicil, coeternity, colophon, conclusion, consequence, constancy,
   continualness, continuation, defeat of time, defiance of time,
   diuturnity, double take, durability, durableness, duration,
   dying words, endlessness, endurance, envoi, epilogue, eternalness,
   eternity, ever-duringness, everlastingness, everness,
   follow-through, follow-up, foreverness, immutability, incessancy,
   indestructibility, infinite duration, infinity, interminability,
   last words, lastingness, long standing, long-lastingness,
   long-livedness, longevity, maintenance, never-endingness,
   parting shot, perdurability, perennation, perenniality,
   perennialness, permanence, peroration, perpetualness, perpetuity,
   persistence, postface, postfix, postlude, postscript, refrain, run,
   second thought, sempiternity, sequel, sequela, sequelae, sequelant,
   sequent, sequitur, stability, standing, steadfastness, subscript,
   suffix, supplement, survival, survivance, swan song, tag,
   timelessness, unceasingness