Rivalry is defined as competition or an ongoing dispute between two parties. There are various synonyms for the word rivalry; some of them include competition, contest, conflict, opposition, and contention. These words all suggest the idea of two sides or individuals striving for superiority or precedence over the other. The word competition implies healthy and fair competition, while contest and conflict indicate a more confrontational approach to the situation. Opposition suggests the presence of opposing parties, while contention indicates a strong disagreement or argument that may be difficult to resolve. In conclusion, there are various synonyms for rivalry, each with its own unique nuance and meaning.