Stringency and Rigorous

noun

• A state occasioned by scarcity of money and a shortage of credit.
  • synonyms: tightness
• Conscientious attention to rules and details.
  • synonyms: strictness

adjective

• Rigidly accurate; allowing no deviation from a standard.
  • usage: "rigorous application of the law"; "a strict vegetarian"
  • synonyms: strict
• Demanding strict attention to rules and procedures.
  • usage: "rigorous discipline"; "tight security"; "stringent safety measures"
  • synonyms: stringent, tight

• (a.) Manifesting, exercising or favoring rigor; allowing no abatement or mitigation; scrupulously accurate; exact; strict; severe; relentless; as, a rigorous officer of justice; a rigorous execution of law; a rigorous definition or demonstration.
• (a.) Severe; intense; inclement; as, a rigorous winter.
• (a.) Violent.