The Collaborative International Dictionary of English v.0.48:

Hortatory \Hor"ta*to*ry\, a. [L. hortatorius.]
   Giving exhortation or advise; encouraging; exhortatory;
   inciting; as, a hortatory speech. --Holland.
   [1913 Webster]

WordNet (r) 3.0 (2006):

hortatory
    adj 1: giving strong encouragement [syn: exhortative,
           exhortatory, hortative, hortatory]

Moby Thesaurus II by Grady Ward, 1.0:

49 Moby Thesaurus words for "hortatory":
   admonitory, advisory, autodidactic, cajoling, cautionary,
   coeducational, consultative, consultatory, cultural, didactic,
   directive, disciplinary, edifying, educating, educational,
   educative, enlightening, exhortative, exhortatory, expostulative,
   expostulatory, homiletic, hortative, illuminating, informative,
   initiatory, instructive, introductory, lecturing, monitorial,
   monitory, moralistic, persuading, persuasive, preaching, preachy,
   preceptive, propaedeutic, recommendatory, remonstrant,
   remonstrative, remonstratory, self-teaching, sententious, suasive,
   teaching, tuitionary, warning, wheedling