Jam
Stop up
Stop up verb - To prevent passage through by filling with something.
Usage example: clear the leaves out of the rain gutters so they don't stop up the downspouts again
Mutual synonyms
Cite this Source
Stop up and Jam. (2016). Retrieved 2026, August 15, from https://thesaurus.plus/related/jam/stop_up
Jam & Stop up. N.p., 2016. Web. 15 Aug. 2026. <https://thesaurus.plus/related/jam/stop_up>.
Stop up or Jam. 2016. Accessed August 15, 2026. https://thesaurus.plus/related/jam/stop_up.
Google Ngram Viewer shows how "jam" and "stop up" have occurred on timeline