The Collaborative International Dictionary of English v.0.48:

Denunciatory \De*nun"ci*a*to*ry\, a.
   Characterized by or containing a denunciation; minatory;
   accusing; threatening; as, severe and denunciatory language.
   [1913 Webster]

WordNet (r) 3.0 (2006):

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