rival candidate;  opposing candidate
 point at issue;  axis of a conflict;  focus of confrontation
 religious opposition;  religious conflict;  religious antagonism
 internal strife;  internal struggle
 feeling of antipathy (rivalry);  antagonistic sentiment
 the exact opposite concept (idea);  the antithesis
 conflicting (opposite, contrasting) opinion;  antagonistic view
 three-cornered competition
 allelic character;  allelomorphic character