Natural
Natural adjective - Being such from birth or by nature.
Rock solid and natural are semantically related. In some cases you can use "Rock solid" instead an adjective "Natural".
Rock solid
Natural and rock solid are semantically related. Sometimes you can use "Natural" instead an adjective phrase "Rock solid".
Cite this Source
Rock solid and Natural. (2016). Retrieved 2026, August 02, from https://thesaurus.plus/related/natural/rock_solid
Natural & Rock solid. N.p., 2016. Web. 02 Aug. 2026. <https://thesaurus.plus/related/natural/rock_solid>.
Rock solid or Natural. 2016. Accessed August 02, 2026. https://thesaurus.plus/related/natural/rock_solid.
Google Ngram Viewer shows how "natural" and "rock solid" have occurred on timeline