Continual

continual
    adj 1: occurring without interruption; chiefly restricted to
           what recurs regularly or frequently in a prolonged and
           closely spaced series; "the continual banging of the
           shutters" [ant: {sporadic}]
    2: `continual' (meaning seemingly uninterrupted) is often used
       interchangeably with `continuous' (meaning without
       interruption)
    

Continual \Con*tin"u*al\, a. [OE. continuel, F. continuel. See
   {Continue}.]
   1. Proceeding without interruption or cesstaion; continuous;
      unceasing; lasting; abiding.
      [1913 Webster]

            He that is of a merry heart hath a continual feast.
                                                  --Prov. xv.
                                                  15.
      [1913 Webster]

   2. Occuring in steady and rapid succession; very frequent;
      often repeated.
      [1913 Webster]

            The eye is deligh by a continental succession of
            small landscapes.                     --W. Irwing.
      [1913 Webster]

   {Continual proportionals} (Math.), quantities in continued
      proportion. --Brande & C.

   Syn: Constant; prepetual; incessant; unceasing;
        uninterrupted; unintermitted; continuous. See
        {Constant}, and {Continuous}.
        [1913 Webster]
    

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