nouns
an opposing military force
"the enemy attacked at dawn"
is a type of (narrower)
a unit that is part of some military service
"he sent Caesar a force of six thousand men"
an armed adversary (especially a member of an opposing military force)
"a soldier must be prepared to kill his enemies"
any hostile group of people
"he viewed lawyers as the real enemy"
is a type of (narrower)
(plural) any group of human beings (men or women or children) collectively
"old people"; "there were at least 200 people in the audience"
a personal enemy
"they had been political foes for years"