an·nun·ci·a·tor 
(ə-nŭnsē-ā′tər)
(ə-nŭnsē-ā′tər)n.
One that announces, especially an electrical signaling device used in hotels or offices to indicate the sources of calls on a switchboard.
an·nunci·a·to′ry (-ə-tōr′ē) adj.
- working girl
- workingman
- working memory
- working papers
- working substance
- workingwoman
- work in progress
- work into
- work like a charm
- workload
- workman
- workmanlike
- workmanship
- workmen's compensation
- work of art
- work off
- work (one's) fingers to the bone
- work one's fingers to the bone
- work out
- workout
- work over
- workpeople
- workplace
- work release
- work-release