Solutions River of Russia has 6 entries with similar clues

• 3-letter words
• donRussian river that rises near Tula southeast of Moscow and flows to Sea of Azov
• 4-letter words
• nevaRussian river
• 5-letter words
• volgaRussian river, the longest in Europe
• 9-letter words
• inauguralSpeech made in summer month by Russian river
• 10-letter words
• dzerzhinskcity in russia on the oka river named after the first leader of the cheka
• 15-letter words
• brahmos-missileMissile that is a joint venture between India and Russia and named after rivers from the countries