The Collaborative International Dictionary of English v.0.48:

Remonstrative \Re*mon"stra*tive\ (r?*m?n"str?*t?v), a.
   Having the character of a remonstrance; expressing
   remonstrance.
   [1913 Webster]

Moby Thesaurus II by Grady Ward, 1.0:

27 Moby Thesaurus words for "remonstrative":
   admonitory, advisory, cautionary, consultative, consultatory,
   didactic, directive, exhortative, exhortatory, expostulative,
   expostulatory, hortative, hortatory, instructive, monitorial,
   monitory, moralistic, objecting, preachy, protestant, protesting,
   recommendatory, remonstrant, remonstratory, sententious,
   under protest, warning