Flack
Flack noun - Artillery designed to shoot upward at airplanes.
Plug
Plug verb - To close up so that no empty spaces remain.
Mutual synonyms
Cite this Source
Plug and Flack. (2016). Retrieved 2026, July 22, from https://thesaurus.plus/related/flack/plug
Flack & Plug. N.p., 2016. Web. 22 Jul. 2026. <https://thesaurus.plus/related/flack/plug>.
Plug or Flack. 2016. Accessed July 22, 2026. https://thesaurus.plus/related/flack/plug.
Google Ngram Viewer shows how "flack" and "plug" have occurred on timeline