The term 'alimentary' refers to the DIGESTIVE system and its related processes. The crossword solutions for this term include 'NUTRITIOUS' (10 letters), 'NUTRITIVE' (9 letters), 'NUTRITIONAL' (11 letters), 'NOURISHING' (10 letters), 'DIGESTIVE' (9 letters), 'digestible' (10 letters), 'COMESTIBLE' (10 letters), 'DIETARY' (7 letters), 'SUSTAINING' (10 letters), 'ileum' (5 letters), 'ORT' (3 letters), 'FOOD' (4 letters), 'ileac' (5 letters), and 'CANAL' (5 letters). These words all relate to the process of digestion, nutrition, and sustenance, which are all functions of the alimentary system.