An army base is a military facility used for the purpose of housing and training personnel. The four crossword solutions for the term 'army base' are FORT (4 letters), CAMP (4 letters), POST (4 letters), and Antfarm (7 letters). A FORT is a large, fortified military installation, usually with defensive walls and other fortifications. A CAMP is a temporary or semi-permanent military base. A POST is a military base, typically smaller than a CAMP or FORT. An Antfarm is a slang term for a small military base. Finally, a Militarypost is a military base that is larger than a POST but smaller than a CAMP or FORT.