Flop
Flop noun - Something that has failed.
Knockout
Knockout noun - Something very good of its kind.
Usage example: the band's new album is a knockout
How words are described
Cite this Source
Knockout and Flop. (2016). Retrieved 2026, July 22, from https://thesaurus.plus/related/flop/knockout
Flop & Knockout. N.p., 2016. Web. 22 Jul. 2026. <https://thesaurus.plus/related/flop/knockout>.
Knockout or Flop. 2016. Accessed July 22, 2026. https://thesaurus.plus/related/flop/knockout.
Google Ngram Viewer shows how "flop" and "knockout" have occurred on timeline