The Collaborative International Dictionary of English v.0.48:

Tautologous \Tau*tol"o*gous\, a. [Gr. ?; ?, for ? ? the same + ?
   to speak.]
   Repeating the same thing in different words; tautological.
   [R.] --Tooke.
   [1913 Webster]

Moby Thesaurus II by Grady Ward, 1.0:

59 Moby Thesaurus words for "tautologous":
   abundant, battological, copious, de trop, diffuse, diffusive,
   dispensable, duplicative, echoic, echoing, effusive, excess,
   expendable, expletive, extravagant, exuberant, fecund, formless,
   gratuitous, gushing, gushy, imitative, in excess, iterative,
   needless, nonessential, overflowing, parrotlike, pleonastic,
   prodigal, productive, profuse, profusive, prolific, prolix,
   recapitulative, redundant, reduplicative, reechoing, reiterant,
   reiterative, repeating, repetitional, repetitionary, repetitious,
   repetitive, spare, superabundant, supererogatory, superfluous,
   tautologic, tautological, teeming, to spare, uncalled-for,
   unessential, unnecessary, unneeded, verbose