Related Clues:

• United, as nations
• Formed a union
• United in a cause
• Blind or broad attachment
• Kindred
• In it together
• Worked together, with "up"
• In tandem
• Joined by treaty
• Fighting on the same side
• Joined (up)
• One-__ (biased)
• In league
• Teamed up
• United (with ''up'')