Roget's Thesaurus of English Words and Phrases by Peter Mark Roget

891. Enemy — N. enemy; antagonist; foe, foeman†; open enemy, bitter

enemy, opponent &c 710; back friend. public enemy, enemy to society. Phr. every hand being against one; he makes no friend who never made a foe [Tennyson]. with friends like that, who needs enemies?; Lord protect me from my friends; I can protect myself from my enemies.