Hard shell
Serious and hard shell are semantically related. In some cases you can use "Serious" instead an adjective phrase "Hard shell".
Serious
Serious adjective - Not joking or playful in mood or manner.
Hard shell and serious are semantically related. Sometimes you can replace phrase "Hard shell" with "Serious", this terms are similar.
Nearby Words: seriously, seriousness
Cite this Source
Serious and Hard shell. (2016). Retrieved 2026, August 14, from https://thesaurus.plus/related/hard_shell/serious
Hard shell & Serious. N.p., 2016. Web. 14 Aug. 2026. <https://thesaurus.plus/related/hard_shell/serious>.
Serious or Hard shell. 2016. Accessed August 14, 2026. https://thesaurus.plus/related/hard_shell/serious.
Google Ngram Viewer shows how "hard shell" and "serious" have occurred on timeline