A is for Army

Photo of an army of caterpillars
Franco Folini / CC BY-SA

Ais forArmy (caterpillar)

A group of caterpillars is called an army. Sometimes a group of ants is called an army too.
Collective nouns
Photo of soldiers
The U.S. Army / CC BY-SA

Ais forArmy (military)

The Army is the military forces of a particular country. The Army is usually distinct from the Navy or the Air Force.
Military