Open
Open adjective - Allowing passage without obstruction.
Rock solid and open are semantically related In some cases you can use "Rock solid" instead an adjective "Open".
Rock solid
Open and rock solid are semantically related in reliable topic. Sometimes you can use "Open" instead an adjective phrase "Rock solid".
Cite this Source
Rock solid and Open. (2016). Retrieved 2026, August 14, from https://thesaurus.plus/related/open/rock_solid
Open & Rock solid. N.p., 2016. Web. 14 Aug. 2026. <https://thesaurus.plus/related/open/rock_solid>.
Rock solid or Open. 2016. Accessed August 14, 2026. https://thesaurus.plus/related/open/rock_solid.
Google Ngram Viewer shows how "open" and "rock solid" have occurred on timeline