  We explore the string spectrum in the Witten QCD model by considering
classical string configurations, thereby obtaining energy formulas for quantum
states with large excitation quantum numbers representing glueballs and
Kaluza-Klein states. In units of the string tension, the energies of all states
increase as the 't Hooft coupling $\lambda $ is decreased, except the energies
of glueballs corresponding to strings lying on the horizon, which remain
constant. We argue that some string solutions can be extrapolated to the small
$\lambda $ regime. We also find the classical mechanics description of
supergravity glueballs in terms of point-like string configurations oscillating
in the radial direction, and reproduce the glueball energy formula previously
obtained by solving the equation for the dilaton fluctuation.
