can someone compare and contrast a multiparty system (a systems with three or more political parties) and a one-party system

Yes, I can. But this is YOUR assignment.

How would you like us to help you with it?

well I now how they a different. A dictatorship vs. the power of my groups; however, I need help finding similarities

http://www.google.com/#q=multi+party+vs+single+party

that link brings me to google. do you have another one?

Hmmm! Obviously you didn't read about the web sites that Google search showed. The first five sites seem to have all of the information you need.

Certainly! Let's compare and contrast a multiparty system and a one-party system.

In a multiparty system:
1. Definition: A multiparty system refers to a political system where three or more political parties compete for power.
2. Diversity of Political Parties: In a multiparty system, there is a higher degree of political competition and more diverse representation of different ideologies, interests, and perspectives.
3. Power Sharing: Parties must often form coalitions or alliances to gain a majority and form a government. This means that decision-making involves negotiation and compromise among multiple parties.
4. Checks and Balances: The presence of multiple parties provides a system of checks and balances, as parties act as watchdogs, holding the ruling party accountable.
5. Representation: A multiparty system usually tries to ensure broader representation for various segments of society, as different parties can cater to specific demographic, regional, or interest-based groups.

In a one-party system:
1. Definition: A one-party system is a political system where a single political party holds complete power, and there is no competition from other parties.
2. Dominance of a Party: In a one-party system, a single party controls all branches of government, including legislative, executive, and judicial. This party monopolizes political power and often suppresses opposition.
3. Lack of Political Pluralism: The absence of multiple parties means limited or no choice for voters and a lack of diverse representation, as all decisions and policies are driven by the ideology of the ruling party.
4. Stability and Efficiency: One-party systems tend to promote stability and streamlined decision-making since there is no need for extensive negotiation or political compromises.
5. Potential for Authoritarianism: The concentration of power in one party can create a risk of authoritarianism, as dissenting voices may be suppressed, and there may be limited checks on the ruling party's actions.

To get a more detailed understanding and to compare these systems in a particular country or region, it is advisable to study historical, political, and sociological sources, as well as analyzing statistical data, electoral systems, and the impact of each system on governance, representation, and institutional dynamics.