Solutions Great river has 4 entries with similar clues

• 4-letter words
• amurRiver of Northeast Asia whose greater part of length forms the border between Russia and china
• avonriver of central england that flows to the river severn at tewkesbury
• 5-letter words
• indusGreat river of South Asia
• 6-letter words
• anduinIn J R R Tolkien's The Lord of the Rings , the great river, east of the Misty Mountains, on whose west bank is the Elvish land of Lothlorien