Robust
Robust adjective - Enjoying health and vigor.
Rock hard and robust are semantically related. In some cases you can use "Rock hard" instead an adjective "Robust".
Nearby Words: robustness, robustly
Rock hard
Cite this Source
Rock hard and Robust. (2016). Retrieved 2026, August 09, from https://thesaurus.plus/related/robust/rock_hard
Robust & Rock hard. N.p., 2016. Web. 09 Aug. 2026. <https://thesaurus.plus/related/robust/rock_hard>.
Rock hard or Robust. 2016. Accessed August 09, 2026. https://thesaurus.plus/related/robust/rock_hard.
Google Ngram Viewer shows how "robust" and "rock hard" have occurred on timeline