Solutions River of the eastern United States has 4 entries with similar clues

• 3-letter words
• redRiver, its source in the United States, flowing north to empty into Winnipeg
• 5-letter words
• yukonRiver of Northwest United States and Canada
• 10-letter words
• ivy-leagueA group of long established universities in the eastern United States
• 14-letter words
• shirley-templeUS child star who represented the United States at the United Nations