The crossword solutions for the term AUTUMN MO. are SEPT (4 letters), AUG (3 letters), NOV (3 letters), OCT (3 letters), and SEP (3 letters). These are all abbreviations for months in the autumn season, which is also known as fall in some parts of the world. SEPT stands for September, AUG stands for August, NOV stands for November, OCT stands for October, and SEP stands for September. All of these months are part of the autumn season, which typically runs from late September to early December in the Northern Hemisphere.