The Collaborative International Dictionary of English v.0.48:

kinetics \ki*net"ics\ (k[i^]*n[e^]t"[i^]ks or
   k[-i]*n[e^]t"[i^]ks), n. (Physics)
   See Dynamics.
   [1913 Webster]

WordNet (r) 3.0 (2006):

kinetics
    n 1: the branch of mechanics concerned with the forces that
         cause motions of bodies [syn: dynamics, kinetics]

Moby Thesaurus II by Grady Ward, 1.0:

54 Moby Thesaurus words for "kinetics":
   activity, actuation, aerial photography, aeroballistics,
   aerodynamics, aerogeology, aerography, aerology, aeromechanics,
   aeromedicine, aerometry, aeronautical meteorology, aerophotography,
   aerophysics, aeroscopy, aerospace research, aerostatics,
   aviation technology, avionics, barodynamics, biodynamics,
   climatology, dynamics, fluid dynamics, geodynamics, going,
   hydrodynamics, hydrostatics, kinematics, kinesiology, kinesipathy,
   kinesis, kinesitherapy, magnetohydrodynamics, meteorology,
   mobilization, motion, motivation, move, movement, moving,
   myodynamics, photometry, pneumatics, restlessness, rocketry,
   running, stir, stirring, supersonics, thermodynamics, unrest,
   velocity, zoodynamics