Stop up and Start

Stop up

Stop up verb - To prevent passage through by filling with something.

Start is an antonym for stop up in topics: obstruct, make airtight.

Start

Start verb - To move suddenly and sharply (as in surprise).

Stop up is an antonym for start.

Cite this Source
Start and Stop up. (2016). Retrieved 2026, August 15, from https://thesaurus.plus/related/stop_up/start
Stop up & Start. N.p., 2016. Web. 15 Aug. 2026. <https://thesaurus.plus/related/stop_up/start>.
Start or Stop up. 2016. Accessed August 15, 2026. https://thesaurus.plus/related/stop_up/start.
Google Ngram Viewer shows how "stop up" and "start" have occurred on timeline