The Collaborative International Dictionary of English v.0.48:

Denunciative \De*nun"ci*a*tive\, a. [L. denuntiativus,
   -ciativus, monitory.]
   Same as Denunciatory. --Farrar.
   [1913 Webster]

WordNet (r) 3.0 (2006):

denunciative
    adj 1: containing warning of punishment [syn: comminatory,
           denunciative, denunciatory]