Question

friend and foe difference

Answer 1

Friend means who is close to us and foe means enemy.

Answer 2

Note that the dictionary mentions 'foe' as an old-fashioned or formal term. The word 'adversary' does mean 'enemy' but it also means an opponent that does not necessarily be your enemy; so is with rival which also means someone who competes. To conclude, use these words carefully. They are not always interchangeable.