Hard shell
Tough proposition and hard shell are semantically related. In some cases you can use "Tough proposition" instead an adjective phrase "Hard shell".
Tough proposition
Hard shell and tough proposition are semantically related. Sometimes you can use "Hard shell" instead an adjective phrase "Tough proposition".
Mutual synonyms
Cite this Source
Tough proposition and Hard shell. (2016). Retrieved 2026, August 13, from https://thesaurus.plus/related/hard_shell/tough_proposition
Hard shell & Tough proposition. N.p., 2016. Web. 13 Aug. 2026. <https://thesaurus.plus/related/hard_shell/tough_proposition>.
Tough proposition or Hard shell. 2016. Accessed August 13, 2026. https://thesaurus.plus/related/hard_shell/tough_proposition.
Google Ngram Viewer shows how "hard shell" and "tough proposition" have occurred on timeline