| A | B |
| oligopoly | a few large companies that took charge of prices for an entire industry |
| muckrakers | reporters who told the public of corruption |
| initiative | the right of voters to place an issue on the ballot in a state election |
| referendum | the right of voters to accept or reject laws |
| recall | the right of voters to remove elected officials who lacked ability for their jobs |
| suffragists | men and women who fought for woman suffrage, or women's right to vote |
| prohibition | laws that banned making or selling liquor |
| trustbuster | a government official who breaks up business groups that limit competition |
| arbitration | the process of settling disputes by accepting the decision of a neutral party |
| Square Deal | fair and equal treatment for all, as promised by President Theodore Roosevelt |
| conservation | protection of natural resources |
| discrimination | unfair treatment of a person or group, usually because of prejudice about race, ethnic group, religion, age group, or gender |
| segregation | separation of one group from another group |
| mutualistas | aid groups for Mexican Americans |
| barrios | Mexican neighborhoods |