Nouns

(n)friendlytroops belonging to or allied with your own military forces“friendlies came to their rescue”

Adjectives

(a)friendlycharacteristic of or befitting a friend“friendly advice”, “a friendly neighborhood”, “the only friendly person here”, “a friendly host and hostess”
(a)friendlyeasy to understand or use“user-friendly computers”, “a consumer-friendly policy”, “a reader-friendly novel”
(a)friendlyof or belonging to your own country's forces or those of an ally“in friendly territory”, “he was accidentally killed by friendly fire”
(s)friendly, well-disposed, well disposedinclined to help or support; not antagonistic or hostile“a government friendly to our interests”, “well disposed to the good order and happiness of the United States”, “a relaxed environment well-disposed to the appreciation of good food and fine wine”