The term 'foe' is used to describe someone who is an ENEMY, OPPONENT, or RIVAL. Nine letter crossword solutions for this term include CONTENDER, ARCHENEMY, INVADER, OPPOSITION, COMPETITOR, ASSAILANT, NEMESIS, ANTI, OPPONENT, ADVERSARY, ANTAGONIST, ENEMY, RIVAL, and friendor. A CONTENDER is someone who competes in a contest or competition. An ARCHENEMY is an ENEMY that has been around for a long time. An INVADER is someone who enters a place by force. OPPOSITION is the act of opposing or resisting something. A COMPETITOR is someone who takes part in a competition. An ASSAILANT is someone who attacks another person. NEMESIS is a powerful ENEMY or OPPONENT. ANTI is a prefix meaning against or opposed to. An OPPONENT is someone who is against something or someone. An ADVERSARY is an ENEMY or OPPONENT. An ANTAGONIST is someone who opposes or is hostile to another. An ENEMY is someone who is opposed to another. A RIVAL is someone who competes with another for the same goal. A friendor is someone who is both a friend and an ENEMY.