enemies, rivals, opponents, adversaries, antagonists
Nemesis, enemy, and antagonist can all be used as synonyms for foe.
Some examples are: enemy, adversary, antagonist, arch-enemy, assailant, bitter enemy, combatant, devil, open enemy, opponent, opposing party, opposite camp, public enemy, sworn enemy
To name just a few: enemy, nemesis, rival...For more synonyms for this and/or other words, go to thesaurus.com.
synonym