Invertebrate and Mettlesome
Opposite meaning words
Invertebrate
Invertebrate adjective - Lacking strength of will or character.
Usage example: an invertebrate Congress that blithely went along with the President's ill-conceived plan
Mettlesome is an antonym for invertebrate.
Mettlesome
Mettlesome adjective - Having much high-spirited energy and movement.
Invertebrate is an antonym for mettlesome.
Cite this Source
Mettlesome and Invertebrate. (2016). Retrieved 2026, July 27, from https://thesaurus.plus/related/invertebrate/mettlesome
Invertebrate & Mettlesome. N.p., 2016. Web. 27 Jul. 2026. <https://thesaurus.plus/related/invertebrate/mettlesome>.
Mettlesome or Invertebrate. 2016. Accessed July 27, 2026. https://thesaurus.plus/related/invertebrate/mettlesome.
Google Ngram Viewer shows how "invertebrate" and "mettlesome" have occurred on timeline