The Collaborative International Dictionary of English v.0.48:

Stuttering \Stut"ter*ing\, n.
   The act of one who stutters; -- restricted by some
   physiologists to defective speech due to inability to form
   the proper sounds, the breathing being normal, as
   distinguished from stammering.
   [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Stuttering \Stut"ter*ing\, a.
   Apt to stutter; hesitating; stammering. -- Stut"ter*ing*ly,
   adv.
   [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Stutter \Stut"ter\, v. t. & i. [imp. & p. p. Stuttered; p. pr.
   & vb. n. Stuttering.] [Freq. of stut, OE. stoten; probably
   of Dutch or Low German origin; cf. D. & LG. stotteren, G.
   stottern, D. stooten to push, to strike; akin to G. stossen,
   Icel. stauta, Sw. st["o]ta, Dan. st["o]de, Goth. stautan, L.
   tundere, Skr. tud to thrust. Cf. Contuse, Obtuse.]
   To hesitate or stumble in uttering words; to speak with
   spasmodic repetition or pauses; to stammer.
   [1913 Webster]

         Trembling, stuttering, calling for his confessor.
                                                  --Macaulay.
   [1913 Webster]

Moby Thesaurus II by Grady Ward, 1.0:

72 Moby Thesaurus words for "stuttering":
   balbutient, balbuties, battology, ceaseless, ceaselessness,
   chattering, constancy, constant, constant flow, continual,
   continualness, continuity, dysphemia, expletive, faltering,
   filling, halting, hesitating, hesitation, incessancy, incessant,
   machine gun, macrology, noninterruption, oscillating, oscillation,
   padding, palilalia, perennial, perpetual, perpetuity, pleonasm,
   pulsating, pulsation, quick fire, rapid, rapid fire,
   rapid recurrence, rapid succession, rapidity, redundancy, regular,
   regularity, repeated, repetition, staccato, stammer, stammering,
   steadiness, steady, stumbling, stutter, sustained, sustainment,
   tattoo, tautologism, tautology, traulism, unbroken, unceasing,
   unchanging, unintermission, unintermitted, unintermittent,
   unintermitting, uninterrupted, uninterruption, unremitting,
   unstopped, unvarying, vibrating, vibration