Rigour is a term that refers to the quality of being strict, severe, harsh, and difficult. It is often used to describe a situation or environment that requires a high level of discipline and adherence to rules. The crossword solutions for the term rigour are STRICTNESS (10 letters), SEVERITY (8 letters), HARSHNESS (9 letters), and HARDSHIP (8 letters). All of these words refer to the same concept of rigour, but each one has its own nuances. STRICTNESS implies a rigid adherence to rules and regulations, while SEVERITY suggests a more intense level of discipline. HARSHNESS implies a lack of mercy or compassion, and HARDSHIP implies a difficult situation or environment.