The term 'Army Bigwig' is an informal way of referring to a high-ranking military officer. The two crossword solutions for this term are GENL (4 letters) and GEN (3 letters). GENL stands for General, which is the highest rank in the United States Army, while GEN stands for General Officer, which is a rank just below General. Both of these ranks are held by officers who have achieved a high level of success in the military and are responsible for leading large groups of soldiers.