n. 25B6; noun
a mine operated under conditions of rigour : STRICTNESS, severity, stringency, toughness, harshness, rigidity, inflexibility, intransigence.
intellectual rigour : METICULOUSNESS, thoroughness, carefulness, diligence, scrupulousness, exactness, exactitude, precision, accuracy, correctness, strictness.
the rigours of the journey : HARDSHIP, harshness, severity, adversity; ordeal, misery, trial; discomfort, inconvenience, privation.