frenemy

As a noun frenemy

is (humorous) someone who pretends to be your friend, but is really your enemy.

As an initialism foe is

friends of the earth.

As nouns the difference between frenemy and enemy

is that frenemy is (humorous) someone who pretends to be your friend, but is really your enemy while enemy is someone who is hostile to, feels hatred towards, opposes the interests of, or intends injury to someone else.

As an adjective enemy is

of, relating to, or belonging to an enemy.

As nouns the difference between friend and frenemy

is that friend is a quaker; a member of the while frenemy is (humorous) someone who pretends to be your friend, but is really your enemy.

As a proper noun friend

is .