Rigorous
Rigorous adjective - Given to exacting standards of discipline and self-restraint.
Tough nut to crack and rigorous are semantically related In some cases you can use "Tough nut to crack" instead an adjective "Rigorous".
Tough nut to crack
Rigorous and tough nut to crack are semantically related in stiff topic. Sometimes you can use "Rigorous" instead an adjective phrase "Tough nut to crack".
Mutual synonyms
Related pairs
- exact and rigorous
- exact and tough nut to crack
- inflexible and rigorous
- inflexible and tough nut to crack
- unyielding and rigorous
- unyielding and tough nut to crack
- immovable and rigorous
- immovable and tough nut to crack
- harsh and rigorous
- harsh and tough nut to crack
- definite and rigorous
- definite and tough nut to crack
- austere and rigorous
- austere and tough nut to crack
Cite this Source
Tough nut to crack and Rigorous. (2016). Retrieved 2026, August 01, from https://thesaurus.plus/related/rigorous/tough_nut_to_crack
Rigorous & Tough nut to crack. N.p., 2016. Web. 01 Aug. 2026. <https://thesaurus.plus/related/rigorous/tough_nut_to_crack>.
Tough nut to crack or Rigorous. 2016. Accessed August 01, 2026. https://thesaurus.plus/related/rigorous/tough_nut_to_crack.
