(EXACTNESS) UK and ANZ, [US and ANZ] rigor [noun] [U] approving - care and exactnessThe article fails to explore the issues with any real rigour.They considered that, as a method, it lacked intellectual rigour.This passage is remarkable for the rigour of its argument and its language.
RIGOUR
Meaning of RIGOUR in English
Cambridge English vocab. Кембриджский английский словарь. 2012