denunciator
noun
de·nun·ci·a·tor
-ēˌātə(r),
-ˌātə-
plural -s
: one that denounces, publishes, or proclaims:
a
: one that proclaims intended or coming evil
b
: one that threatens or accuses
Word History
Etymology
Middle French denonciateur, from Latin denuntiator police officer, from denuntiatus + -or