In United States politics, "two-party" refers to a political system dominated by just two major parties, i.e., the Republican and the Democratic party. However, there are several synonyms for this term that can be used to describe a similar political setup. For instance, "bipartisan" refers to the cooperation or agreement between two political parties. "Dual-party" highlights the number of parties involved, while "duopoly" emphasizes the control over a particular market or industry by only two companies. "Two-sided," "binary," and "dichotomous" are other synonyms that can be used to describe a two-party political system. Finally, "partisan," which means supporting or a member of a particular political party, is also linked to a two-party system.