| rigor | (noun) something hard to endure | Synonyms: asperity, grimness, hardship, rigorousness, rigour, rigourousness, severeness, severity |
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| (noun) the quality of being valid and rigorous | Synonyms: cogency, rigour, validity |
| (noun) excessive sternness | Synonyms: hardness, harshness, inclemency, rigorousness, rigour, rigourousness, severeness, severity, stiffness |
| rigorous | (adjective) demanding strict attention to rules and procedures | Synonyms: stringent, tight |
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| (adjective) rigidly accurate; allowing no deviation from a standard | Synonyms: strict |
| rigorously | (adverb) in a rigorous manner | Synonyms: strictly |
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| rigorousness | (noun) something hard to endure | Synonyms: asperity, grimness, hardship, rigor, rigour, rigourousness, severeness, severity |
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| (noun) excessive sternness | Synonyms: hardness, harshness, inclemency, rigor, rigour, rigourousness, severeness, severity, stiffness |
| rigour | (noun) something hard to endure | Synonyms: asperity, grimness, hardship, rigor, rigorousness, rigourousness, severeness, severity |
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| (noun) the quality of being valid and rigorous | Synonyms: cogency, rigor, validity |
| (noun) excessive sternness | Synonyms: hardness, harshness, inclemency, rigor, rigorousness, rigourousness, severeness, severity, stiffness |
| rigourousness | (noun) something hard to endure | Synonyms: asperity, grimness, hardship, rigor, rigorousness, rigour, severeness, severity |
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| (noun) excessive sternness | Synonyms: hardness, harshness, inclemency, rigor, rigorousness, rigour, severeness, severity, stiffness |
| rigout | (noun) a person's costume (especially if bizarre) | - |
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